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Weather.gov
> NWS Service Change Notices
When NWS proposes or finalizes changes to products or services, this page is updated and official notices are sent out on the
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Service Change Notices ( SCN - Current-2023)
Data Management Messages
Archive of PNS/SCN/TIN (1996-2022)
Public Information Statements 2026
Apr 21:
PNS26-36
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
April 30, 2026
Apr 21:
PNS26-35
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
April 28, 2026
Apr 21:
PNS26-34
: Soliciting comments on the Probabilistic HeatRisk Prototype through
September 30, 2026
Apr 20:
PNS26-33
: Hurricane Threats and Impacts (HTI) Mosaic Testing on
April 21, 2026
(backup date: April 23, 2026)
Apr 17:
PNS26-32
: Soliciting Comments on Proposed Changes to the Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model through
May 17, 2026
Apr 16:
PNS26-31
: Spring 2026 Forecast Zones Implementation will occur today,
April 16, 2026
Apr 16:
PNS26-30
: Soliciting Public Comments through
May 16, 2026
, on the Termination of Various Products from the Global Forecast System
Apr 15:
PNS26-16
Updated
: Soliciting Comments on Transition of Reference Points in Aviation Weather Products through
May 15, 2026
Apr 15:
PNS26-29
: Soliciting Public Comments through
May 15, 2026
on the Proposed Upgrade to the Global Forecast System
Apr 14:
PNS26-28
: Soliciting Comments until
May 15, 2026
, on Ending Dissemination of Climate Prediction Center Legacy Redbook Graphic Images
Apr 14:
PNS26-27
: Soliciting Public Comments through
May 14th, 2026
, on the Proposed Removal of All Products from Smartinit
Apr 14:
PNS26-26
: Soliciting Public Comments through
May 14th, 2026
, on the Proposed Removal of All Products from the Combined NCEP/FNMOC Wave Ensembles (NFCENS) system
Apr 08:
PNS24-31 Updated
: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through
September 30, 2026
Apr 06:
PNS26-25
: Soliciting comments for Experimental Ensemble QPF Tracking Tools through
June 30, 2026
Apr 03:
PNS26-24
: Soliciting Comments on Proposed Retirement of Graphical AIRMET BUFR Format through
May 4, 2026
Mar 26:
PNS26-23
: Soliciting Comments on Experimental Ceiling and Visibility Dashboard product through
April 30, 2026
Mar 24:
PNS26-22
: Soliciting Comments on the Experimental Tropical Cyclone Track and Error Cone Graphics from the National Hurricane Center Through
November 30, 2026
Mar 19:
PNS26-21
: Experimental implementation of the Evaporative Demand Drought Index (EDDI) monitoring product for the Contiguous U.S. on or about
March 24, 2026
Mar 18:
PNS26-20
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
March 26, 2026
Mar 18:
PNS26-19
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
March 24, 2026
Mar 13:
PNS26-18
: Soliciting Comments through
April 20, 2026
on the Upcoming Change in the Delivery Time of the Ultraviolet Index (UVI) Forecast
Mar 12:
PNS26-17
: Soliciting Comments through
April 15, 2026
on Upgrading Real-Time Ocean Forecast System (RTOFS) to version 3.0.
Mar 05:
PNS25-34
Updated
: Soliciting comments on expansion of experimental Spanish-Translated Tropical Cyclone Products to the Central Pacific and those issued by the Weather Prediction Center through
November 30, 2027
Mar 05:
PNS26-16
: Updated: Soliciting Comments on Transition of Reference Points in Aviation Weather Products through
May 15, 2026
Mar 05:
PNS24-13
Updated
: Soliciting Comments on Experimental Spanish- Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through
November 30, 2027
Mar 03:
PNS26-15
: Soliciting Comments through
April 05, 2026
on the Proposed Upgrade of the Hurricane Analysis and Forecast System (HAFS) to version 2.2
Feb 23:
PNS26-14
: Soliciting Comments on the Termination of the Space Weather Prediction Center (SWPC) CTIPe Total Electron Content Model until March 25, 2026
Feb 11:
PNS26-13
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
February 19, 2026
Feb 11:
PNS26-12
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
February 17, 2026
Feb 10:
PNS26-11
: Soliciting Comments through
March 13, 2026
on Proposed Change to Water Level Datum Displayed on the National Water Prediction Service (NWPS) Webpage
Feb 06:
PNS26-10
: Soliciting Comments on the Upgrade of the Nearshore Wave Prediction System (NWPS) to Version 1.5.0 through
March 16, 2026
Feb 04:
PNS25-59 Updated
: Soliciting comments through
July 31, 2026
for potential changes to Red Flag Warning standard formatting
Feb 03:
PNS26-09:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Miley Memorial Field (KBPI) and Worland Municipal Airport (KWRL) through
March 5, 2026
Feb 03:
PNS26-08
: Soliciting Comments on Experimental Graphical Turbulence Guidance (GTG) Nowcast (GTGN) product through
March 5, 2026
Jan 28:
PNS26-07
: Soliciting Comments through
February 28, 2026
on the Proposed Replacement of GEFS Aerosol Products with the Global Chemistry and Aerosol Forecast System (GCAFS) version 1.0
Jan 22:
PNS26-06
: Soliciting Comments on Proposed Changes to the Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model through
February 20, 2026
Jan 13:
PNS26-05
: Public Information Statement Implementing a Relative Oceanic Niño Index effective
February 1, 2026
Jan 07:
PNS26-04
: Soliciting comments through
February 10, 2026
on the proposed discontinuance of the 36-hour wind and wave forecast for a small portion of the Atlantic and Pacific Oceans
Jan 07:
PNS26-03
: Soliciting Comments through
February 9, 2026
on the Discontinuation of the State Forecast Product (SFP)
Jan 06:
PNS26-02
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
January 15, 2026
Jan 06:
PNS26-01
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
January 13, 2026
Public Information Statements 2025
Dec 22:
PNS25-81
: Soliciting Comments on the new Experimental High Seas Gridded Forecasts from the Ocean Prediction Center (OPC) in the National Digital Forecast Database (NDFD) through
September 30, 2026
Dec 17:
PNS25-80
: Soliciting Comments through
January 19, 2026
on the Discontinuation of the Mexican Weather Roundup and the Latin America and Caribbean Hourly Weather Roundup (RWRMX) Products
Dec 16:
PNS25-79
: Soliciting Comments through
January 16, 2026
on the Discontinuation of the Temperature and Precipitation Table Products (TPT)
Dec 12:
PNS25-78
: Soliciting Comments on the Upgrade of the Surge and Tide Operational Forecast System (STOFS) to Version 3.1.0 through
January 16, 2026
Dec 10:
PNS25-77
: Soliciting comments on the upgrade of the National Water Model to Version 3.1 through
January 29, 2026
Dec 9:
PNS25-76
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
December 18, 2025
Dec 9:
PNS25-75
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
December 16, 2025
Nov 26:
PNS25-74
: Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Castle Airport (KMER), Atwater CA, through
December 26, 2025
Nov 20:
PNS25-73
: Soliciting comments on the proposed termination of the North American Mesoscale Forecast System (NAM) Model Output Statistics (NAM MOS) products, through Monday,
December 22, 2025
Nov 19:
PNS25-72
: Soliciting Comments through
December 19, 2025
on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices
Nov 17:
PNS25-68 Updated
: Soliciting comments through
December 1, 2025
on the proposed reduction in coverage areas for the High Seas Forecast near the Equator and International Dateline
Nov 13:
PNS25-71
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
November 20, 2025
Nov 13:
PNS25-70
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
November 18, 2025
Nov 6:
PNS24-67 Updated
: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through
November 30, 2026
Nov 4:
PNS25-69
: Soliciting Comments on the new Experimental Graphical Marine Wind Warnings through
November 1, 2026
Oct 21:
PNS24-77 Updated
: Soliciting Comments through
September 30, 2026
, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
Oct 9:
PNS25-65 Updated
: Soliciting comments through
November 7, 2025
for termination of Miscellaneous Fire Weather Product (FWM) used to produce National Fire Danger Rating System (NFDRS) forecasts
Oct 9:
PNS19-36 Updated
: Soliciting Comments on Experimental Winter Storm Outlook through
May 15, 2026
Oct 3:
PNS25-68 Updated
: Soliciting comments through
December 1, 2025
on the proposed reduction in coverage areas for the High Seas Forecast near the Equator and International Dateline
Oct 1:
PNS25-67
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
October 7, 2025
Oct 1:
PNS25-66
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
October 9, 2025
Sep 29:
PNS21-68 Updated
: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through
April 30, 2026
Sep 29:
PNS24-72
Updated:
Soliciting Comments through
June 30, 2026
on the Experimental Probabilistic Precipitation Portal
Sep 25:
PNS25-65 Updated
: Soliciting comments through
November 7, 2025
for termination of Miscellaneous Fire Weather Product (FWM) used to produce National Fire Danger Rating System (NFDRS) forecasts
Sep 22:
PNS25-64
: Proposal of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Arapahoe County, Colorado effective
March 2026
Sep 16:
PNS25-63
: Soliciting Comments on the Experimental Urban Rain Rate Dashboard through
September 30, 2026
Sep 15:
PNS25-62
: Soliciting comments on the proposed new Global Cache service for WIS 2.0 services through
October 24, 2025
Sep 3:
PNS25-61
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
September 11, 2025
Sep 3:
PNS25-60
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
September 9, 2025
Sep 3:
PNS23-55 Updated
: Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through
September 30, 2026
Aug 28:
PNS25-58
Updated
: Soliciting Comments on the Experimental National Water Center (NWC) Synthetic Aperture Radar River Ice Surveillance (SARRIS) Product through
August 31, 2027
Aug 28:
PNS25-59 Updated
: Soliciting comments through
July 31, 2026
for potential changes to Red Flag Warning standard formatting
Aug 28:
PNS25-58
Updated
: Soliciting Comments on the Experimental National Water Center (NWC) Synthetic Aperture Radar River Ice Surveillance (SARRIS) Product through
August 31, 2027
Aug 27:
PNS25-57:
Soliciting feedback on proposed changes to Alaska Aviation Weather Unit Surface and Significant Weather charts through
October 29, 2025
Aug 21:
PNS25-56
: Soliciting Public Comments on the Termination of Various Graphics from the EMC Verification System (EVS) Website through
September 20, 2025
Aug 11:
PNS25-55
Anchorage Federal Building Power Outage will affect some NWS Operational Data from
August 16 to August 18, 2025
Aug 4:
PNS25-54
: Soliciting Comments on Proposed Enhancements to the Probabilistic Winter Storm Severity Index through
September 6, 2025
Aug 4:
PNS22-43
Updated
Extending Comment Period for the National Water Center’s Experimental Area Hydrologic Discussion Product through
June 30, 2026
Jul 31:
PNS25-53
: Soliciting comments on the proposed thinning of percentile data for the next implementation of the National Blend of Models (NBM) through
October 6, 2025
Jul 25:
PNS25-52
: Soliciting Comments on the Proposed Discontinuation of the Global Ensemble Forecast System (GEFS) Aerosol Component 06 and 18 UTC Forecasts through
August 24, 2025
Jul 25:
PNS25-51
: Soliciting Comments on the Proposed Termination of the Short Range Ensemble Forecast System (SREF) through
August 24, 2025
Jul 23:
PNS25-50
: Soliciting Comments on the NWS Use of the Bluesky Social Media Platform through
January 26, 2026
Jul 21:
PNS25-49
: Soliciting Comments on Proposed Changes to the Winter Storm Severity Index through
August 22, 2025
Jul 18:
PNS25-48
: Use of singular Valid Time Event Code (VTEC) for NWS Freezing Spray Effective
July 17, 2025
Jul 16:
PNS25-47
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
July 22, 2025
Jul 16:
PNS25-46
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
July 24, 2025
Jul 15:
PNS25-45
: Soliciting Comments on the Proposed Upgrade of the National Blend of Models through
November 21, 2025
Jul 9:
PNS25-44:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Las Vegas Municipal Airport and Tucumcari Municipal Airport through
Monday August 11, 2025
Jul 3:
PNS25-43:
Soliciting comments on the proposed new Global Broker service for WIS 2.0 services through
August 11, 2025
Jul 1:
PNS20-28 Updated:
Soliciting Comments on the Experimental National Water Center Visualization Services through
June 30, 2026
Jun 26:
PNS25-42
: Soliciting Comments on the Proposed Termination of Various Environmental Modeling Center Web Sites and Data Products through
July 26, 2025
Jun 26:
PNS25-41
: Soliciting Comments on Proposed Discontinuation of the North American Mesoscale (NAM) model and other Regional Modeling Systems to be Replaced by the Rapid Refresh Forecast System (RRFS) through
July 26, 2025
Jun 17:
PNS25-35 Updated:
Soliciting Feedback through
July 28, 2025
on consolidating NWS Dissemination Applications, including the WMO Regional Association IV GTS Internet File Service (RA-IV GIFS) Website
Jun 12:
PNS25-40:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
June 16, 2025
Jun 12:
PNS25-39:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
June 17, 2025
Jun 09:
PNS25-38:
Soliciting Comments for Addition of Mountain Wave Turbulence to the Graphical AIRMETs through
August 1, 2025
May 27:
PNS25-37:
Soliciting Feedback through
June 26, 2025
on the Potential Retirement of the Model Analysis and Guidance (MAG) Website
May 27:
PNS25-36:
Soliciting Feedback through
June 26, 2025
on consolidating NWS Dissemination Applications, including the stand-alone alerts.weather.gov webpage
May 27:
PNS25-35 Updated:
Soliciting Feedback through
July 28, 2025
on consolidating NWS Dissemination Applications, including the WMO Regional Association IV GTS Internet File Service (RA-IV GIFS) Website
May 21:
PNS25-34
Updated
: Soliciting comments on expansion of experimental Spanish-Translated Tropical Cyclone Products to the Central Pacific and those issued by the Weather Prediction Center through
November 30, 2027
May 20:
PNS24-13
Updated
: Soliciting Comments on Experimental Spanish- Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through
November 30, 2027
May 20:
PNS25-33:
Soliciting Comments through
June 25, 2025
on the proposed discontinuation of the condensed versions of offshore marine forecast products
May 17:
PNS25-32:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
May 27, 2025
May 17:
PNS25-31:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
May 28, 2025
May 7:
PNS24-77 Updated
: Soliciting Comments through
September 30, 2026
, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
May 5:
PNS25-30:
Soliciting Comments through
June 6, 2025
on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for National Weather Service (NWS) Honolulu Forecast Office (HFO)
May 1:
PNS25-29
: Soliciting Feedback on the World Meteorological Organization (WMO) Information System (WIS2.0) WIS2 Node API and Service through
June 6, 2025
May 1:
PNS25-28
: Soliciting Comments on the Proposed Upgrade of LAMP and Gridded LAMP Guidance through
May 30, 2025
Apr 22:
PNS25-27:
Hurricane Threats and Impacts (HTI) Mosaic Testing on
April 24, 2025
(backup date: April 29, 2025)
Apr 17:
PNS24-67 Updated
: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through
November 30, 2026
Apr 17:
PNS25-26
: National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
April
24, 2025
Apr 17:
PNS25-25
: NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
April 22, 2025
Apr 16:
PNS24-31 Updated
: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through
September 30, 2026
Apr 14:
PNS25:24
Soliciting Comments on Proposed Changes to the Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model through
May 14, 2025
Apr 14:
PNS25-23:
Soliciting Comments through
May 14, 2025
on the Proposed Upgrade of the Global Forecast System (GFS) to Version
16.4.0
Apr 9:
PNS25-22:
Soliciting Comments through
May 10, 2025
on the Proposed Upgrade of the Real-Time Ocean Forecast System (RTOFS) to version 2.5
Apr 3:
PNS25-21:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Talladega Municipal Airport, Talladega AL (KASN) through
May 3, 2025
Apr 3:
PNS25-20:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Bryce Canyon Airport (KBCE), Bryce UT, through
May 3, 2025
Apr 1:
PNS22-18 Updated:
Weather Forecast Office (WFO) Guam to Produce Experimental Public and Marine Grids for East and West Micronesia for Inclusion into the National Digital Forecast Database: Effective March 29, 2022
Mar 24:
PNS24-42 Updated:
Soliciting Comments on Updates to the Experimental Tropical Cyclone Track and Error Cone Graphic from the National Hurricane Center Through
November 30, 2025
Mar 24:
PNS25-19:
Soliciting public comments through
April 20, 2025
on the proposed discontinuation of the Unified Surface Analysis
Mar 20:
PNS25-18:
Reduction of Radiosonde Observations (RAOB) to One Flight Per Day at Aberdeen, SD, Gaylord, MI, Grand Junction, CO, Green Bay, WI, North Platte, NE, and Riverton, WY, Effective
March 20, 2025.
Mar 20:
PNS25-17:
Suspension of Radiosonde Observations at Omaha, Nebraska, and Rapid City, South Dakota, Effective
March 20, 2025
Mar 20:
PNS25-16:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecasts (TAF) at and Falmouth Joint Base Cape Cod, Barnstable County, MA (KFMH) and Westfield-Barnes Regional Airport, Westfield, MA (KBAF) through
April 30, 2025
Mar 19:
PNS25-15:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
March 27, 2025
Mar 19:
PNS25-14:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
March 25, 2025
Mar 17:
PNS25-13:
Delay of the Spring 2025 Forecast Zones Implementation Date to
March 19, 2025
Mar 14:
PNS25-12:
Soliciting Comments through
April 14, 2025
on the Proposed Upgrade of the Hurricane Analysis and Forecast System (HAFS) to version 2.1
Mar 7:
PNS25-11:
Intermittent Suspension of Radiosonde Observations at Albany, New York, and Gray, Maine,
Effective Immediately
Mar 6:
PNS25-10:
Soliciting Comments through
May 30, 2025
on the Experimental Modernized Hydrologic Outlook (ESF) and River Summary (RVA) for Alaska Spring River Ice Breakup
Mar 3:
PNS25-09:
Soliciting Comments on the Addition of Experimental Probabilistic Hazard Information to the 8- to 14-day Hazards
Outlook (Contiguous U.S. and Alaska) through
June 30, 2025
Feb 27:
PNS25-08:
Suspension of Radiosonde Observations at Kotzebue, Alaska, Effective
Immediately
Feb 20:
PNS25-07:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
February 27, 2025
Feb 20:
PNS25-06:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
February 25, 2025
Feb 13:
PNS25-05:
National Weather Service (NWS) Implementation of Updated Naming Conventions per Executive Order 14172
Feb 6:
PNS23-59 Updated:
Soliciting Comments through
December 31, 2025
on the Experimental NWS Translation Website
Jan 28:
PNS19-38 Updated:
Soliciting Comments on the Experimental Probabilistic Quantitative Precipitation Forecast (PQPF) Webpages through
November 21, 2025
Jan 27:
PNS25-04:
Soliciting Comments for Changes to the Convective Significant Meteorological Information Product through
February 28, 2025
Jan 22:
PNS25-03:
Soliciting Comments through
February 21, 2025
, on the Proposed Upgrade of the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT) to Version 9.0
Jan 21:
PNS25-02:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
January 30, 2025
Jan 21:
PNS25-01:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
January 28, 2025
Public Information Statements 2024
Dec 18:
PNS24-78:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecasts (TAFs) at Anniston Regional Airport, Anniston, Alabama (KANB) through
January 18, 2025
Dec 18:
PNS24-77 Updated
: Soliciting Comments through
September 30, 2026
, on the Experimental Hydrologic Ensemble Forecast Service (HEFS) API Data Services
Dec 18:
PNS24-76:
Soliciting Comments on Proposed Changes to the Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model through
January 22, 2025
Dec 16:
PNS24-75:
Soliciting Comments on Upgrade 4.3 of the National Blend of Models through
January 21, 2025
Dec 9:
PNS24-73 Updated:
CANCELED:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 12, 2024
Dec 9:
PNS24-66 Updated:
Potential API Gridded Forecast Data Outage from
December 22, 2024 through January 1, 2025
Dec 4:
PNS24-74:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
December 10, 2024
Dec 9:
PNS24-73 Updated:
CANCELED:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on December 12, 2024
Dec 9:
PNS24-66 Updated:
Potential API Gridded Forecast Data Outage from
December 22, 2024 through January 1, 2025
Nov 14:
PNS24-72
Updated
: Soliciting Comments through
June 30, 2026
on the Experimental Probabilistic Precipitation Portal
Nov 8:
PNS24-71:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
November 12, 2024
Nov 8:
PNS24-70:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
November 14, 2024
Oct 31:
PNS24-69:
Soliciting Comments through
December 1, 2024
to Support Termination of the 72-Hour Low Tracks Graphic and the Non-Technical 72-Hour Low Tracks Graphic
Oct 28:
PNS24-68:
Soliciting Comments for Transition of Select Area Forecasts (FA) through
November 28, 2024
Oct 16:
PNS24-67 Updated
: Soliciting Comments on the experimental Graphical Week Two Marine Wind Speed and Wave Height Probabilities through
November 30, 2026
Oct 16:
PNS22-10 Updated:
Soliciting Comments until
May 31, 2025
on Snow Ratio Grids as an Experimental Element in the National Digital Forecast Database (NDFD)
Dec 9:
PNS24-66 Updated:
Potential API Gridded Forecast Data Outage from
December 22, 2024 through January 1, 2025
Oct 16:
PNS24-65:
Soliciting Comments on the Proposed Termination of the Tropical Weather Summary through
November 20, 2024
Oct 15:
PNS21-68 Updated
: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through
April 30, 2026
Oct 10:
PNS24-64 Updated:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast Scheduled for October 17, 2024
Canceled
Oct 10:
PNS24-63 Updated:
National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast Scheduled for October 15, 2024
Canceled
Oct 7:
PNS19-36 Updated: Soliciting Comments on Experimental Winter Storm Outlook through May 15, 2026
Oct 7:
PNS24-62 Updated:
Soliciting Comments through
November 2, 2024
on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Central Region Offices
Sep 26:
PNS24-61:
Soliciting Comments on Prototype NOAA Atlas 15 Precipitation Frequency Services over Montana through
January 31, 2025
Sep 25:
PNS22-42 Updated:
Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through
June 30, 2025
Sep 25:
PNS22-55 Updated:
Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through
September 30, 2025
Sep 25:
PNS22-43 Updated:
Extending Comment Period on the National Water Center's Experimental Area Hydrologic Discussion Product through
June 30, 2025
Feb 6, 2025:
PNS23-59 Updated:
Soliciting Comments through
December 31, 2025
on the Experimental NWS Translation Website
Sep 11:
PNS24-60:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
September 19, 2024
Sep 11:
PNS24-59:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
September 17, 2024
Aug 27:
PNS24-39 Updated:
Soliciting Comments through
October 16, 2024
on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
Aug 23:
PNS24-58:
Soliciting Comments through
September 22, 2024
on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0.8
Aug 23:
PNS24-57:
Soliciting Comments through
September 23, 2024
on the Experimental Deployment of the Global Total Electron Content (GloTEC) Ionosphere Model
Aug 27:
PNS24-39 Updated:
Soliciting Comments through
October 16, 2024
on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
Aug 20:
PNS22-36 Updated:
Extending Comment Period on Experimental Potential Coastal Flood Extent Overlays until
August 30, 2025
Aug 14:
PNS24-56:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
August 20, 2024
Aug 14:
PNS24-55:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
August 22, 2024
Jul 30:
PNS24-54:
Soliciting Comments through
September 16, 2024
on a proposal to implement Partial County Alerting (PCA) via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System for Hennepin County, Minnesota
Jul 29:
PNS24-53:
Soliciting Comments through
September 16, 2024
on a Proposed Alaska Region change to use the Universal Geographic Code (UGC) County Equivalent Format for Short-Fused Polygon Warning and Advisory Products
Jul 29:
PNS24-52:
Soliciting Comments on Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) through
August 30, 2024
Jul 18:
PNS24-51:
New Online Maps for NOAA Weather Radio All Hazards (NWR) Coverage and Tsunami Alerting Areas Along the Alaska, Washington, Oregon, and California Coastlines
Jul 18:
PNS24-50:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
July 25, 2024
Jul 18:
PNS24-49:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
July 30, 2024
Jul 17:
PNS24-48:
Re-commencement of Operational Test and Evaluation (OT&E) for the Replacement Temperature and Dewpoint Sensor for the Automated Surface Observing System (ASOS) during
July 2024
Jul 17:
PNS24-47:
NWS is Extending the Public Comment and Review on the Experimental Use of Social Media through
November 30, 2024
Jun 28:
PNS19-03 Updated:
Soliciting Comments on the Experimental Graphical Hazardous Weather Outlook (GHWO) through
February 28, 2025
Jun 21:
PNS24-46:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
June 27, 2024
Jun 21:
PNS24-45:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
June 25, 2024
Jun 14:
PNS24-44:
Suspension of Radiosonde Observations at Tallahassee, FL: Effective
July 1, 2024
Jun 10:
PNS24-43:
Soliciting Feedback on the Proposed Use of "Particularly Dangerous Situation" Wording in Blizzard Warnings and Ice Storm Warnings through
September 10, 2024
Jun 3:
PNS24-42 Updated:
Soliciting Comments on Updates to the Experimental Tropical Cyclone Track and Error Cone Graphic from the National Hurricane Center Through
November 30, 2025
Jun 3:
PNS24-41:
National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing
June 4, 2024
Jun 3:
PNS24-40:
Soliciting Comments on the Proposed Implementation of Key Messages through
August 31, 2024
Aug 27:
PNS24-39 Updated:
Soliciting Comments through
October 16, 2024
on a Proposal to Replace the Imperial Unit "Feet" with the Metric Unit "Meter" in National Marine Center High Seas Text and Graphical Products
May 28:
PNS24-38:
Soliciting Comments on the Proposed Changes to Fire Weather Products to Support Discontinuation of Haines Index and Lightning Activity Level (LAL) as Fire Weather Forecast Elements through
August 1, 2024
May 17:
PNS24-37:
National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing
May 20-24, 2024
(backup Week: June 3-7)
May 16:
PNS24-36:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
May 23, 2024
May 16:
PNS24-35:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
May 21, 2024
May 14:
PNS24-34:
Soliciting Comments on Updates to the NOS Operational Forecast System (OFS) Framework Version and the Implementation of the Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River through
June 6, 2024
May 3:
PNS24-33:
National Weather Service (NWS) Directives System URL Change: Effective on or about
June 3, 2024
Sep 16:
PNS23-59
Updated:
Soliciting Comments through
December 31, 2024
on the Experimental NWS Translation Website
Apr 25:
PNS24-32:
Hurricane Threats and Impacts (HTI) Mosaic Testing on
April 25, 2024
Apr 22:
PNS22-41 Updated:
Soliciting Comments through
October 31, 2024
on Expansion of Experimental Surf Forecast Matrix to 7 WFOs
Apr 22:
PNS24-31 Updated
: Soliciting Comments on Experimental HeatRisk Grids in the National Digital Forecast Database (NDFD) and WPC HeatRisk CONUS Viewer through
September 30, 2026
Apr 18:
PNS24-30:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
April 25, 2024
Apr 18:
PNS24-29:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
April 23, 2024
Apr 16:
PNS24-28:
WFO Fairbanks NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on
May 1, 2024
Apr 15:
PNS24-27:
Soliciting Public Comments until
May 16, 2024
on the Proposed Decommissioning of the NOAA Profiler Network (NPN)
Apr 11:
PNS24-26:
Soliciting Comments on Proposed Termination of Terminal Aerodrome Forecast (TAF) at Troy Municipal Airport, Troy, AL (KTOI) through
May 7, 2024
Apr 11:
PNS24-25:
Hurricane Threats and Impacts (HTI) Mosaic Testing on
April 11, 2024
and
April 25, 2024
Sep 25:
PNS22-42 Updated:
Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through
June 30, 2025
Apr 1:
PNS24-24:
Soliciting Comments on Prototype Period for Fire Detection and Monitoring until
November 1, 2024
Mar 29:
PNS24-23:
Soliciting Comments on the Experimental Weeks 3-4 Mean North American 500 Millibar Height Outlook through
June 26, 2024
Mar 15:
PNS24-22:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
March 31, 2024
Mar 15:
PNS24-21:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
March 19, 2024
Mar 15:
PNS24-20:
Alaska NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tsunami Warning on
March 27, 2024
at 10:20 AM AKDT
Mar 11:
PNS24-19:
NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tsunami Warning by the Eureka, California Weather Forecast Office (WFO) on
March 27, 2024
at Approximately 11:00 AM PDT
Mar 11:
PNS24-18:
Soliciting Public Comments through
April 11, 2024
on the Proposal to Limit Tropical Information in High Seas Forecasts from 120 Hours to Only the First 48 Hours
Mar 5:
PNS24-17:
Indiana Statewide NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on Tuesday,
March 12, 2024
at 10:15 AM EDT
Mar 1:
PNS24-16:
NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXM88, Waynesboro, Georgia:
Effective Immediately
Feb 29:
PNS24-15:
Soliciting Comments on the Experimental Deployment of an Update to the Electric Power Dashboard Webpage through
March 30, 2024
Feb 28:
PNS24-14:
Soliciting Comments on the Removal of Certain Products from the Air Quality Model (AQM) Version 7 through
March 28, 2024
Feb 27:
PNS24-13
Updated
: Soliciting Comments on Experimental Spanish- Translated Tropical Cyclone Products from the National Hurricane Center (NHC) through
November 30, 2027
Feb 23:
PNS24-12:
Soliciting Public Comments on Potential Changes to the Real Time Ocean Forecast System (RTOFS) through
March 27, 2024
Feb 23:
PNS24-11:
Soliciting Comments on the Proposed Upgrade of LAMP and Gridded LAMP Guidance and the Discontinuation of Web Station Plots through
March 25, 2024
Feb 21:
PNS24-10:
Kentucky Statewide NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Tornado Warning on
March 6, 2024
at 10:07 AM EST
Feb 15:
PNS24-09:
WFO Fairbanks NOAA Weather Radio All Hazards (NWR) and Emergency Alert System (EAS) Live Event Code Test for a Flash Flood Warning on
February 28, 2024
Feb 14:
PNS24-08:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
February 22, 2024
Feb 14:
PNS24-07:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
February 20, 2024
Feb 12:
PNS24-06:
Soliciting Comments on Proposed Termination of the Day 3-7 Hemispheric Charts through
April 12, 2024
Feb 7:
PNS24-05:
Soliciting Public Comments on the Proposed Upgrades of Hurricane Analysis and Forecast System (HAFS) Version-2 through
March 11, 2024
Feb 1:
PNS24-04:
Soliciting Comments through
March 6, 2024
on Proposed Changes to the OPC 24-Hour Surface and Wind and Wave Forecast Charts, the 24-Hour Wind and Wave Forecast Chart, and 24-Hour Surface Chart
Jan 18:
PNS24-03:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
January 25, 2024
Jan 18:
PNS24-02:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
January 23, 2024
Jan 16:
PNS24-01:
Enforcement of Geographical Boundaries in the Atlantic and Eastern North Pacific Tropical Weather Discussions from the National Hurricane Center’s Tropical Analysis and Forecast Branch: Effective on or around
May 15, 2024
Public Information Statements 2023
Dec 19:
PNS23-66 Updated:
Scheduled National Tsunami Warning Center Routine Communications Test for the East and Gulf Coast on
December 19, 2023 Canceled
Dec 19:
PNS23-70:
Soliciting Comments until
January 19, 2024
on discontinuing the Texas/Oklahoma Panhandles Supplementary Observations (AGO) Product
Dec 18:
PNS23-69:
Soliciting Comments through
January 18, 2024
on Extending the 34- and 50-kt Wind Radii Forecasts Operationally from 3 Days to 5 Days in the Tropical Cyclone Forecast/Advisory Product (TCM)
Dec 12:
PNS23-68:
Soliciting Comments on the Experimental Hawaiian Extended Range Forecast Webpage until
January 12, 2024
Dec 6:
PNS23-67:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
December 21, 2023
Dec 19:
PNS23-66 Updated:
Scheduled National Tsunami Warning Center Routine Communications Test for the East and Gulf Coast on
December 19, 2023 Canceled
Nov 16:
PNS23-63 Updated:
Soliciting Comments through
December 5, 2023
on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Southern Region Offices
Nov 16:
PNS23-65:
Soliciting Comments through
December 15, 2023
Regarding Evaluation of National Water Prediction Service (NWPS) Website
Proposed to Replace the Advanced Hydrologic Prediction Service (AHPS) Website
Nov 14:
PNS23-64:
Soliciting Comments on the Experimental Caribbean and Central American Rainfall Graphic through
November 30, 2025
Nov 16:
PNS23-63 Updated:
Soliciting Comments through
December 5, 2023
on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Southern Region Offices
Oct 16, 2024:
PNS22-10 Updated:
Soliciting Comments until
May 31, 2025
on Snow Ratio Grids as an Experimental Element in the National Digital Forecast Database (NDFD)
Nov 6:
PNS23-62:
Commencement of Operational Test and Evaluation (OT&E) for the Replacement Temperature and Dew Point Sensor for the Automated Surface Observing System (ASOS) during
November 2023
Nov 1:
PNS23-61:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
November 9, 2023
Nov 1:
PNS23-60:
National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast to Take Place on
November 7, 2023
Oct 30:
PNS22-18 Updated:
Weather Forecast Office (WFO) Guam to Produce Experimental Public and Marine Grids for East and West Micronesia for Inclusion into the National Digital Forecast Database:
Effective March 29, 2022
Feb 6, 2025:
PNS23-59 Updated:
Soliciting Comments through
December 31, 2025
on the Experimental NWS Translation Website
Oct 25:
PNS23-58:
The Slidell, Louisiana WSR-88D is to be Decommissioned on or about
November 27, 2023
in Preparation for Relocation to Hammond, Louisiana
Oct 23:
PNS23-57:
Soliciting Comments through
December 31, 2023
on Experimental Deployment of Updated Solar Cycle Prediction Product Webpage
Oct 20:
PNS19-02 Updated:
Soliciting Comments until
April 30, 2024
on Availability of Probabilistic Snow Grids for Select Weather Forecast Offices (WFOs) as an Experimental Element in the National Digital Forecast Database (NDFD) for the Contiguous United States (CONUS)
Oct 20:
PNS14 Updated:
Soliciting Comments until
April 30, 2024
on the Continuation of the Probabilistic Winter Precipitation Forecast Experiment
Oct 19:
PNS23-56:
Soliciting Public Comments through
November 18, 2023
on the Proposed Termination of Certain Web Graphics Being Produced by EMC
Oct 15, 2024:
PNS21-68 Updated
: Soliciting Comments on the Experimental Standardized Weather Forecast Office (WFO) Avalanche Weather Webpage at 18 WFOs through
April 30, 2026
Oct 7, 2024:
PNS19-36:Updated: Soliciting Comments on Experimental Winter Storm Outlook through May 15, 2026
Sep 28:
PNS23-17 Updated:
Soliciting Comments on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0 through
October 28, 2023
Sep 26:
PNS23-55 Updated:
Soliciting Comments on Experimental Flood Inundation Mapping (FIM) Services through
September 30, 2024
Sep 13:
PNS23-54:
Soliciting Comments through
October 13, 2023
on the Proposed Upgrade of the North American Ensemble Forecast System (NAEFS) from Version 6 to Version 7
Sep 5:
PNS23-53:
Soliciting Comments through
October 5, 2023
on Experimental Storm Prediction Center (SPC) Day 1 Convective Outlook with Severe Timing Guidance and Graphic Displays
Sep 1:
PNS23-52:
Soliciting Comments through
November 30, 2023
on the Issuance of the Experimental Modernized Drought Information Statement (DGT) through Weather Forecast Office (WFO) “Drought Information Statement” Webpages and in PDF Format
Aug 31:
PNS23-51:
Information to Assist Users Migrating to NWS-Direct Sources of NWS Common Alerting Protocol (CAP) Messages, Effective on or after
July 20, 2023
Aug 23:
PNS23-50:
Anchorage, AK Federal Building Power Outage Will Affect some NWS Operational Data from
August 25
to
August 28, 2023
Aug 17:
PNS23-49:
Soliciting Comments on Transition to Plain Language Headlines within NWS Alerting System through
September 17, 2023
Aug 15:
PNS23-48:
National Data Buoy Center (NDBC) will be Disestablishing Twelve Tropical Atmosphere Ocean (TAO) Array Stations in Accordance with the Recommendations of the Tropical Pacific Observing System 2020 Final Report: Beginning
2023
Aug 10:
PNS23-47:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
August 17, 2023
Aug 10:
PNS23-46:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
August 15, 2023
Aug 1:
PNS22-56 Updated:
Soliciting Comments through
January 31, 2024
for the Experimental Global Tropics Hazards Outlook for Week-3
Jul 28:
PNS23-45:
Soliciting Comments on an Upgrade of the National Blend of Models through
August 31, 2023
Jul 24:
PNS23-44:
NWS Dissemination GIS Status Message – AWIPS Basemap Shapefile Configuration: Effective
September 1, 2023
Jul 13:
PNS23-43:
Soliciting Comments on the Upgrade of the Surge and Tide Operational Forecast System (STOFS) to Version 2.0.0 through
September 27, 2023
Jun 30:
PNS23-42:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
July 13, 2023
Jun 30:
PNS23-41:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
July 11, 2023
Jun 16:
PNS23-40:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
June 21, 2023
Jun 16:
PNS23-39:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
June 20, 2023
Jun 1:
PNS23-38:
Soliciting Comments on the Proposed Upgrade of the Ultraviolet Index (UVI) Forecast through
June 30, 2023
May 15:
PNS23-37:
Soliciting Comments on the Display of Future Plain Language Headlines to Replace “Advisory” through
June 16, 2023
May 15:
PNS23-36:
Soliciting Comments on Removing 1 Degree Fleet Numerical Meteorology and Oceanography Center Data from the North American Ensemble Forecast System through
June 14, 2023
May 12:
PNS23-35:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
May 23, 2023
May 12:
PNS23-34:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
May 25, 2023
May 12:
PNS23-33:
National Tropical Cyclone Watch Warning Product (TCV) Collaboration Testing
May 15-19, 2023
May 10:
PNS23-32:
Soliciting Comments on Potential Decommissioning of the User-Defined Area Forecast Service and Webpage through
July 30, 2023
May 10:
PNS23-31:
Soliciting Comments on Potential Decommissioning of the NWS Enhanced Data Display (EDD) through
July 30, 2023
May 9:
PNS23-30 REMINDER:
Comments Sought by
June 4, 2023
on National Weather Service Service Description Document v2.0 for Impact-based Decision Support Services
Apr 28:
PNS23-29:
Soliciting Public Comments through
May 30, 2023
on Proposed Changes to Alaska Aviation Weather Unit (AAWU) Area Forecast (FA) Issuance Times
Apr 28:
PNS23-28:
Soliciting Public Comments on the Proposed Termination of Certain Web Graphics Being Produced by EMC through
May 28, 2023
Apr 27:
PNS21-02 Updated:
Soliciting Comments on the Experimental National Hydrologic Discussion through
June 30, 2024
Sep 25, 2024:
PNS22-42 Updated:
Soliciting Comments on the Experimental Flood Hazard Outlook (FHO) Product through
June 30, 2025
Sep 25, 2024:
PNS22-43 Updated:
Extending Comment Period on the National Water Center's Experimental Area Hydrologic Discussion Product through
June 30, 2025
Apr 25:
PNS23-27:
Changes to ‘Alaska Weather’ Television Program: Effective
July 1, 2023
Apr 21:
PNS23-26:
Soliciting Public Comments on Removing Global Forecast System (GFS) Wave Products from the EMC FTP Server through
May 21, 2023
Apr 5:
PNS23-25:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
April 13, 2023
in Conjunction with the PACIFEX23 Tsunami Exercise
Apr 5:
PNS23-24:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
April 11, 2023
Apr 4:
PNS23-23:
Soliciting Comments on the Experimental Deployment of the US-Canada 1D Geoelectric Model through
May 4, 2023
Apr 4:
PNS23-22:
Soliciting Comments on Proposed Changes to the Format and Delivery of NWS High Seas Forecast Information through
May 4, 2023
Apr 4:
PNS23-21:
Comments Sought by
June 4, 2023
on National Weather Service Service Description Document v2.0 for Impact-based Decision Support Services
Mar 27:
PNS23-20:
Soliciting Comments on Proposed Upgrades to the P-ETSS and ETSS Models through
April 26, 2023
Mar 22:
PNS23-19:
Soliciting Comments on Proposed Changes to NWS Tropical Cyclone Watch/Warning Text Products Issued By Local Weather Forecast Offices through
June 8, 2023
Mar 22:
PNS23-18:
Soliciting Comments on Proposed Changes to NWS Coastal/Lakeshore Flood and Storm Surge Products and Services through
June 8, 2023
Sep 28:
PNS23-17 Updated:
Soliciting Comments on Upgrading the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0 through
October 28, 2023
Mar 16:
PNS23-16:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
March 31, 2023
Mar 1:
PNS23-15:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast in Conjunction with the LANTEX23 Tsunami Exercise on
March 2, 2023
Feb 28:
PNS23-14:
Soliciting Comments on Prototype NWSChat 2.0 Application through
April 3, 2023
Feb 23:
PNS23-13:
Soliciting Public Comment on the Upgrade of the Whole Atmosphere Model-Ionosphere Plasmasphere Electrodynamics Model (WAM-IPE) Forecast System (WFS) to Version 1.2 through
March 24, 2023
Feb 22:
PNS23-12:
Soliciting Comments on the Proposed Discontinuation of the Marine Service Chart MSC-15 through
March 27, 2023
Feb 17:
PNS23-11:
Soliciting Comments through
March 19, 2023
on the Proposed Removal of AutoNowCaster Products from the Multi-Radar, Multi-Sensor Application
Feb 15:
PNS23-10:
Soliciting Comments on Discontinuing the Alaska Recreational River Forecast (RVRAK) until
March 17, 2023
Feb 15:
PNS23-09:
Soliciting Comments on Updates to Graphical Flood Products in Alaska until
March 17, 2023
Feb 10:
PNS23-08:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast on
February 24, 2023
Feb 10:
PNS23-07:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
February 21, 2023
Feb 6:
PNS23-06:
Soliciting Comments on the Upgrade of the National Water Model to Version 3.0 through
March 28, 2023
Jan 25:
PNS22-11 Updated:
Soliciting Comments on Experimental Excessive Rainfall Outlook for Days 4-5 through
February 26, 2023
Jan 25:
PNS23-05:
Soliciting Comments on Discontinuing the Forecasts of High Pressure Systems in the High Seas Text Forecasts Issued by WFO Honolulu, Hawaii and the Ocean Prediction Center through
February 27, 2023
Jan 12:
PNS23-04:
Soliciting Comments on the Proposed Termination of the River and Lake Forecast Product (RVD) through
February 23, 2023
Jan 10:
PNS23-03:
National Tsunami Warning Center Routine Communications Tests for the West Coast and Alaska Coast to Take Place on
January 19, 2023
Jan 10:
PNS23-02:
NWS to Issue National Tsunami Warning Center Routine Communications Tests for the East and Gulf Coast on
January 17, 2023
Jan 9:
PNS23-01:
Description of Known Issues and More Details Regarding Upgrade of the Surge and Tide Operational Forecast System (STOFS, Formerly ESTOFS) to Version 1.1.1: Effective
January 10, 2023
For older PNSs, SCNs and TINs,
go to
_______________________________________________________________________________________________________________________
Service Change Notices 2026
Apr 21:
SCN26-24 Updated
: Upgrade of National Blend of Models Guidance effective
April 23, 2026
Apr 15:
SCN26-40
: The Experimental Caribbean and Central American Rainfall Graphic Product will Transition to Operational Status on or about
May 19, 2026
Apr 15:
SCN26-39 Updated
: Termination of the GEOALERT report at the National Weather Service (NWS) Space Weather Prediction Center (SWPC) effective on or about
May 19, 2026
Apr 13:
SCN26-24 Updated
: Upgrade of National Blend of Models Guidance effective
April 23, 2026
Apr 06:
SCN26-38
: Implementation of Temporary Terminal Aerodrome Forecast (TAF) for the following airport: Pearland Regional Airport (KLVJ), Houston, TX Effective
June 13, 2026
Apr 03:
SCN26-37
: Implementation of the Ens_Tracker package: Effective
April 8, 2026
Apr 01:
SCN26-36
: Change to Water Level Datum Displayed on the National Water Prediction Service (NWPS) Webpage at Select Alaska Region Sites on
May 1, 2026
Mar 30:
SCN26-35
: Termination of the Space Weather Prediction Center (SWPC) CTIPe Total Electron Content Model effective on or about
March 31, 2026
Mar 27:
SCN26-34
: Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices: Effective
May 6, 2026
Mar 27:
SCN26-33
: Discontinuation of the Mexican Weather Roundup and the Latin America and Caribbean Hourly Weather Roundup (RWRMX) Products: Effective on or about
April 29, 2026
Mar 26:
SCN26-32
: Implementation of Temporary Terminal Aerodrome Forecast (TAF) for the following airport: David Wayne Hooks Memorial Airport (KDWH), Tomball, Tx Effective
June 13, 2026
Mar 24:
SCN26-31
: Expansion of Storm Surge Watch and Warning, Potential Storm Surge Flooding Map, and the Peak Storm Surge Forecast Graphic to Hawaii Effective On or About
June 1, 2026
Mar 23:
SCN26-30
: NOS / CO-OPS will begin generating all water level data in Standard Hydrologic Exchange Format (SHEF) on or about
April 23, 2026
Mar 23:
SCN25-80 Updated
: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective
March 30, 2026
Mar 23:
SCN26-29
: Discontinuing 36-hour wind and wave forecast for a small portion of the Atlantic and Pacific Oceans effective
April 23, 2026
Mar 20:
SCN26-28
: Discontinuation of the Temperature and Precipitation Table Products (TPT): Effective on or about
April 21, 2026
Mar 16:
SCN26-27
: Operational Implementation of the National Hurricane Center Tropical Cyclone Track and Error Cone Graphic with U.S. Inland Watches and Warnings on or about
May 15, 2026
Mar 16:
SCN26-26
: Changes to the Cone Depiction on the Track and Error Cone Graphics for Tropical Cyclones in the South Pacific and Western North Pacific Basins on or about
May 15, 2026
Mar 13:
SCN26-25
: Upgrade to HYSPLIT 9.0 to implement a Transfer Coefficient Matrix (TCM) methodology for faster simulation of radiological and volcanic ash events.
Effective April 16, 2026
Mar 12:
SCN26-24 Updated
: Upgrade of National Blend of Models Guidance effective
April 23, 2026
Mar 09:
SCN26-23
: Implementation of Temporary Terminal Aerodrome Forecast (TAF) for North Perry Airport in Pembroke Pines, FL (KHWO): Effective
June 13, 2026
Mar 03:
SCN26-12
Updated
: Notification of Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) Effective
March 18, 2026
Mar 03:
SCN26-22
: Termination of Terminal Aerodrome Forecast (TAF) Service for Castle Airport (KMER) in Atwater, CA effective
May 19, 2026
Mar 02:
SCN26-21
: Data Format Changes Impacting Space Weather Prediction Center Products Effective on or about
March 31, 2026
Feb 27:
SCN26-20
: Change to NEXRAD Level III Product Dissemination on or about
March 23, 2026
Feb 26:
SCN25-102
Updated
: Changes to Atlantic Marine Forecast Zones for the Ocean Prediction Center effective
April 16, 2026
Feb 26:
SCN25-101
Updated:
Changes to Marine Zones for NWS Weather Forecast Offices From Caribou, ME to Charleston, SC Effective
April 16, 2026
Feb 26:
SCN25-100
Updated
: Changes to Public and Fire Forecast Zones for WFO Tulsa, OK effective
April 16, 2026
Feb 26:
SCN25-99
Updated
: Changes to Public and Marine Weather Zones for NWS Weather Forecast Office New Orleans/Baton Rouge, LA, effective
April 16, 2026
Feb 26:
SCN25-98
Updated
: Changes to Public, Fire Weather, and Marine Forecast Zones for NWS Weather Forecast Office Charleston, SC effective
April 16, 2026
Feb 26:
SCN25-97
Updated
: Changes to Public, Fire, and Marine Forecast Zones for WFO Wakefield, VA, effective
April 16, 2026
Feb 26:
SCN25-96
Updated
: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS)for Arapahoe County, Colorado effective on
April 16, 2026
Feb 26:
SCN25-95
Updated
: Changes to Public Forecast Zones for WFO Bismarck, ND, effective
April 16, 2026
Feb 26:
SCN25-94
Updated:
Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective
April 16, 2026
Feb 26:
SCN25-93
Updated
: Changes to Fire Forecast Zones for WFO Eureka, CA effective
April 16, 2026
Feb 26:
SCN25-92
Updated
: Changes to Public Forecast Zones for WFO Eureka, CA, effective
April 16, 2026
Feb 26:
SCN25-91
Updated
: Changes to Public and Fire Forecast Zones for WFO Las Vegas, NV effective
April 16, 2026
Feb 26:
SCN25-90
Updated
: Changes to Public and Fire Forecast Zones for WFO Sacramento, CA effective
April 16, 2026
Feb 25:
SCN25-80 Updated
: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective
March 30, 2026
Feb 23:
SCN26-19:
Addition of Terminal Aerodrome Forecast (TAF) Service for Aiken Regional Airport, SC (KAIK): Effective April 6, 2026
Feb 20:
SCN25-71
Updated: Volcano Observatory Notification for Aviation (VONA) to be transmitted via the Aeronautical Fixed System (AFS): Effective March 5, 2026
Feb 18:
SCN26-18
: Implementation of version 2.0 of the EMC Verification System (EVS) and Changes to Various Graphics on the (EVS) Website on or about
March 23, 2026
Feb 17:
SCN26-17
Updated:
Implementation of Mountain Wave Turbulence to the Graphical AIRMETs: Effective
April 30, 2026
Feb 13:
SCN26-16
: Addition of Avalanche Watch for the San Francisco Peaks & Kachina Peaks Wilderness in Arizona beginning
March 15, 2026
Feb 13:
SCN26-15
: Upgrade NCEP Global Ensemble Forecast System to v12.3.18: Effective on or about
Feb 24, 2026
Feb 13:
SCN26-12
Updated
: Notification of Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) Effective
March 18, 2026
Feb 11:
SCN26-14
Updated
: Implementation of Updated Wireless Emergency Alerts Messages for NWS Tsunami Warnings or around
March 19, 2026
Feb 10:
SCN26-08 Updated
: URL change for WPC FTP over HTTPS site https://www.ftp.wpc.ncep.noaa.gov/ on or around
March 3rd, 2026
Feb 10:
SCN26-13
: Experimental Modernized Hydrologic Outlook (ESF) and River Summary (RVA) for Alaska Spring River Ice Breakup will transition to operational status on
March 12, 2026
Feb 09:
SCN26-12
Updated
: Notification of Upgrading the Climate Data Assimilation System (CDAS) to the Conventional Observation Reanalysis (CORe) Effective
March 18, 2026
Feb 03:
SCN25-93
Updated
: Changes to Fire Forecast Zones for WFO Eureka, CA effective
March 3, 2026
Jan 29:
SCN26-11
: Upcoming Changes to Storm Prediction Center (SPC) Day 1, 2, and 3 Convective Outlook Forecasts on or about
March 2, 2026
Jan 29:
SCN26-10
: Format change of the Space Weather Prediction Center (SWPC) 45-day Ap and F10.7cm Flux Forecast effective
March 1, 2026
Jan 28:
SCN26-09
: Removal of the Aviation Weather Center's (AWCs) Rapid- Refresh-Based Inflight Icing (IFI) product from the National Blend Of Models (NBM) effective
March 2, 2026
Jan 28:
SCN26-08 Updated
: URL change for WPC FTP over HTTPS site https://www.ftp.wpc.ncep.noaa.gov/ on or around
March 3rd, 2026
Jan 26:
SCN26-07
Updated
: Update of Multi-Radar Multi-Sensor (MRMS) to version 12.3.1. Effective
February 4, 2026
Jan 22:
SCN26-07
Updated
: Update of Multi-Radar Multi-Sensor (MRMS) to version 12.3.1. Effective
February 4, 2026
Jan 22:
SCN26-06
: Changes to Alaska Aviation Weather Unit Surface and Significant Weather charts starting on or after
February 22, 2026
Jan 16:
SCN26-05
: Implementation of the Weeks 3-4 Temperature and Precipitation Greater Hawaiian Islands Forecast Web Page on
February 17, 2026
Jan 14:
SCN26-04
: Implement change in coverage areas for the High Seas Text Forecast near the Equator and International Dateline effective
February 17, 2026
Jan 14:
SCN26-03
: Termination of File Transfer Protocol (FTP) service for madis-data.ncep.noaa.gov on or around
April 21, 2026
Jan 12:
SCN25-94
Updated
: Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective
March 3, 2026
Jan 12:
SCN26-02
: Termination of Fire Danger Rating System (NFDRS) Forecast (FWM) and all derived products on
January 26, 2026
Jan 09:
SCN26-01
: The Addition of Experimental Probabilistic Hazard Information to the 8- to 14-day Hazards Outlook (Contiguous U.S. and Alaska) will transition to operational status on or about
February 10, 2026
Jan 07:
SCN25-80 Updated
: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective
March 30, 2026
Jan 07:
SCN25-94
Updated:
Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective
March 3, 2026
Service Change Notices 2025
Dec 22:
SCN25-103
: Extending the Terminal Aerodrome Forecast (TAF) Validity Period at Nashville International Airport (KBNA) from 24 hours to 30 hours effective
January 27, 2026
Dec 19:
SCN25-102
Updated
: Changes to Atlantic Marine Forecast Zones for the Ocean Prediction Center effective
April 16, 2026
Dec 19:
SCN25-101
Updated:
Changes to Marine Zones for NWS Weather Forecast Offices From Caribou, ME to Charleston, SC Effective
April 16, 2026
Dec 19:
SCN25-100
Updated
: Changes to Public and Fire Forecast Zones for WFO Tulsa, OK effective
April 16, 2026
Dec 19:
SCN25-99
Updated
: Changes to Public and Marine Weather Zones for NWS Weather Forecast Office New Orleans/Baton Rouge, LA, effective
April 16, 2026
Dec 19:
SCN25-98:
Updated
: Changes to Public, Fire Weather, and Marine Forecast Zones for NWS Weather Forecast Office Charleston, SC effective
April 16, 2026
Dec 19:
SCN25-97
Updated
: Changes to Public, Fire, and Marine Forecast Zones for WFO Wakefield, VA, effective
April 16, 2026
Dec 19:
SCN25-96
Updated
: Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS)for Arapahoe County, Colorado effective on
April 16, 2026
Dec 19:
SCN25-95
Updated
: Changes to Public Forecast Zones for WFO Bismarck, ND, effective
April 16, 2026
Dec 19:
SCN25-94 Updated
: Changes to Public, Marine and Fire Weather Forecast Zones for WFO Anchorage, AK effective
March 3, 2026
Dec 19:
SCN25-93
Updated
: Changes to Fire Forecast Zones for WFO Eureka, CA effective
March 3, 2026
Dec 19:
SCN25-92
Updated
: Changes to Public Forecast Zones for WFO Eureka, CA, effective
April 16, 2026
Dec 19:
SCN25-91
Updated
: Changes to Public and Fire Forecast Zones for WFO Las Vegas, NV effective
April 16, 2026
Dec 19:
SCN25-90
Updated
: Changes to Public and Fire Forecast Zones for WFO Sacramento, CA effective
April 16, 2026
Dec 16:
SCN25-81 Updated
: Consolidation of Data Subsetting Services via Termination of OpenDAP Format Files on nomads.ncep.noaa.gov Effective:
February 23, 2026
Dec 11:
SCN25-67 Updated
: Radar Operations Center Testbed Configuration Identifier Changes: Effective on or about
September 29, 2025
Dec 11:
SCN25-88 Updated
: Operational implementation of the Marine Weather Message for WFO Juneau beginning
January 8, 2026
Dec 9:
SCN25-89
: Implementation of the Artificial Intelligence Global Forecast System (AIGFS), Artificial Intelligence Global Ensemble Forecast System (AIGEFS), and the Hybrid Global Ensemble Forecast System (HGEFS): Effective
December 17, 2025
Dec 8:
SCN25-88 Updated
: Operational implementation of the Marine Weather Message for WFO Juneau beginning
January 8, 2026
Dec 8:
SCN25-88 Updated:
Operational implementation of the Marine Weather Message for WFO Juneau beginning
January 8, 2026
Dec 8:
SCN25-87:
Removal of the North American Rapid Refresh-Time Lagged Ensemble (NARRE-TL) System and Environmental Model Center NARRE- TL Verification, Extra Tropical Cyclone Tracker, and legacy Real-Time Ocean Forecast System Verification Websites Effective on or about
January 7th, 2026
Dec 5:
SCN25-86
: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Tucumcari Municipal Airport in Tucumcari, NM (KTCC) effective
February 19, 2026
Dec 5:
SCN25-85
: Field Test of Staggered Pulse Repetition Time (SPRT) on or around
January 1, 2026
Dec 4:
SCN25-84
: Termination of UKMET Data on the Satellite Broadcast Network: Effective
December 8, 2025
Dec 4:
SCN25-80 Updated
: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective
March 30, 2026
Dec 3:
SCN25-83 Updated:
Discontinuation of the condensed versions of offshore marine forecast products on
January 6, 2026
Dec 2:
SCN25-83 Updated:
Discontinuation of the condensed versions of offshore marine forecast products on
January 6, 2026
Dec 2:
SCN25-82
: Termination of NCEP Model Data Service FTPPRD Effective:
Feb 23, 2026
Dec 2:
SCN25-81
: Consolidation of Data Subsetting Services via Termination of OpenDAP Format Files on nomads.ncep.noaa.gov Effective:
January 20, 2026
Nov 18:
SCN25-80 Updated
: Implementation of the Domestic Aviation Forecast System (DAFS) v1.0: Effective
March 30, 2026
Nov 17:
SCN25-79
: Changes to the Weather Prediction Center Days 3-7 Surface Progs Issuance Times Effective on or about
December 17, 2025
Nov 17:
SCN25-78
: Transfer of Terminal Aerodrome Forecast (TAF) Responsibility for Westfield-Barnes Regional Airport (KBAF) to the United States Air Force (USAF): Effective
1700 UTC December 16, 2025
Nov 6:
SCN25-77
: Discontinuation of stratospheric temperature and wind forecast graphics on or about
December 15, 2025
Oct 30:
SCN25-76
: Changes to International Operational Meteorological (OPMET) Data Distribution on or about
December 3, 2025
Oct 29:
SCN25-73 Updated
: Decommissioning of the Alerts Webpage Effective
December 2, 2025
Oct 20:
SCN25-75
: Operational Implementation of Changes to the WIS 2.0 Global Broker on or about
October 28, 2025
Oct 09:
SCN25-62 Updated
: Changes and additions to LAMP station-based and gridded guidance effective
October 9, 2025
Sep 24:
SCN25-66 Updated
: Probabilistic Rip Risk, Wave Runup data, and Spectral point outputs moving to NOMADS: Effective
October 15, 2025
Sep 23:
SCN25-74
: Operational Implementation of Enhancements to the Probabilistic Winter Storm Severity Index on
October 23, 2025
Sep 18:
SCN25-73 Updated
: Decommissioning of the Alerts Webpage Effective
December 2, 2025
Sep 17:
SCN25-72
: Operational Implementation of Changes to the Winter Storm Severity Index on or about
October 17, 2025
Sep 16:
SCN25-71
: Volcano Observatory Notification for Aviation (VONA) to be transmitted via the Aeronautical Fixed System (AFS) beginning in
November 2025
Sep 16:
SCN25-70
: Termination of Terminal Aerodrome Forecast (TAF) Service for Las Vegas Municipal Airport in Las Vegas, NM (KLVS) effective
December 2, 2025
Sep 3:
SCN25-69
: Upgrade to National Blend of Models (NBM) Tropical 10m Wind Speed/Wind Direction grids:
Effective September 2, 2025
Sep 3:
SCN25-68
: Deprecating TLS 1.1: Effective
October 6, 2025
Aug 29:
SCN25-67 Updated
: Radar Operations Center Testbed Configuration Identifier Changes: Effective on or about
September 29, 2025
Aug 22:
SCN25-59
Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment:
Effective Immediately
Aug 22:
SCN25-66 Updated
: Probabilistic Rip Risk, Wave Runup data, and Spectral point outputs moving to NOMADS: Effective
October 15, 2025
Aug 22:
SCN25-51 Updated:
Update for ObsProc Observation processing for GFS, GDAS and NAM:
Effective Immediately
Aug 22:
SCN25-65
: Extending the Terminal Aerodrome Forecast (TAF) Validity Period at Kona Airport (PHKO) and Kahului Airport (PHOG) from 24 hours to 30 hours:
Effective October 15, 2025
Aug 21:
SCN25-64 Updated
: Upgrade to Wind Tropical Cyclone forecast Message v 1.11
Effective Immediately
Aug 18:
SCN25-63
Updated:
Minor RTMA Upgrade to Version 2.10.10: Effective
August 26, 2025
Aug 13:
SCN25-64 Updated
: Upgrade to Wind Tropical Cyclone forecast Message v 1.11
Effective Immediately
Aug 13:
SCN25-63
Updated
: Minor RTMA Upgrade to Version 2.10.10: Effective
August 26, 2025
Aug 12:
SCN25-62:Updated
: Changes and additions to LAMP station-based and gridded guidance effective
October 9, 2025
Aug 12:
SCN25-61
Decommissioning of the Radar Level II Monitoring Website: Effective
October 7, 2025
Aug 7:
SCN25-55 Updated
: Terminal Aerodrome Forecast (TAF) Service for Talladega Municipal Airport in Talladega, AL (KASN) effective
October 22, 2025
Aug 7:
SCN25-60
: The Weeks 3-4 Temperature and Precipitation Outlooks will change from two-category to three-category on or about
October 3, 2025
Aug 1:
SCN25-59
Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment:
Effective Immediately
Aug 1:
SCN25-58
: Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 24.0 Beta Test to Begin the Week of
September 8, 2025
Jul 30:
SCN25-57
: Probabilistic Extra-Tropical Storm Surge (P-ETSS) model upgrade: Effective
September 2, 2025
Jul 30:
SCN25-56
: Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for National Weather Service (NWS) Honolulu Forecast Office (HFO): Effective
September 2, 2025
Jul 29:
SCN25-55 Updated
: Terminal Aerodrome Forecast (TAF) Service for Talladega Municipal Airport in Talladega, AL (KASN) effective
October 22, 2025
Jul 22:
SCN25-47 Updated:
Upgrade of the Real-Time Ocean Forecast System (RTOFS) to Version 2.5: Effective
July 29, 2025
Jul 22:
SCN25-48 Updated:
Upgrade to Hurricane Analysis and Forecast System (HAFS) to version 2.1: Effective
July 29, 2025
Jul 17:
SCN25-54
: Change in Product Issuance Times and Frequency for Weather Prediction Center Medium Range Products and Climate Prediction Center 8-14 Day Hazards Outlook: Effective
August 20, 2025
Jul 16:
SCN25-46 Updated
: Upgrade of Multi-Radar Multi-Sensor (MRMS) to version 12.3: Effective on
August 5, 2025
Jul 15:
SCN25-53
: Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to version 6.0.4 Effective
August 20, 2025
Jul 15:
SCN25-52
: Upgrades to the Alaska Aviation Weather Unit Winds Aloft and Hourly Observation Charts on or after
August 14, 2025
Jul 10:
SCN25-51 Updated:
Update for ObsProc Observation processing for GFS, GDAS and NAM:
Effective Immediately
Jul 03:
SCN25-50
: Prototype Fire Detection and Monitoring will Transition to Operational Status on or about
July 11, 2025
Jun 26:
SCN25-49
: Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Bryce Canyon Airport in Bryce, UT (KBCE) effective
September 16, 2025
Jun 24:
SCN25-48 Updated:
Upgrade to Hurricane Analysis and Forecast System (HAFS) to version 2.1: Effective
July 29, 2025
Jun 24:
SCN25-47 Updated:
Upgrade of the Real-Time Ocean Forecast System (RTOFS) to Version 2.5: Effective
July 29, 2025
Jun 23:
SCN25-46 Updated
: Upgrade of Multi-Radar Multi-Sensor (MRMS) to version 12.3: Effective on
August 5, 2025
May 29:
SCN25-45
: Discontinuation of stratospheric temperature and height products derived from the NESDIS retrieval soundings of the Advanced Microwave Sounding Unit (AMSU) on board the NOAA Polar Orbiting Environmental Satellites (POES) on
June 15, 2025
May 22:
SCN25-44
: Upgrade NWS API Website forecast and alerts endpoints Effective:
May 22, 2025
May 22:
SCN25-32 Updated:
Upgrade to SPC post processing for NCEP models, Effective
May 27, 2025
May 21:
SCN25-43:
Changes to U.S. Volcanic Ash Advisory Center Advisories no later than
November, 27, 2025
May 19:
SCN25-32 Updated:
Upgrade to SPC post processing for NCEP models, Effective
May 27, 2025
May 19:
SCN25-34 Updated:
Upgrade of National Blend of Models guidance effective
May 27, 2025
May 12:
SCN25-42:
NCEP Central Operations (NCO) Upper Air Thanks Webpage URL Change: Effective on or about 1200 UTC
May 19, 2025
May 07:
SCN25-41:
Implementation of Terminal Aerodrome Forecast (TAF) Service for Auburn University Regional Airport in Auburn, AL (KAUO) effective
July 30, 2025
May 06:
SCN25-40:
Addition of Central Pacific Tropical Cyclone Genesis Information into the Eastern Pacific Tropical Weather Outlook on or around
June 1, 2025
Apr 30:
SCN25-39:
Weather Forecast Offices Fairbanks and Juneau, AK To Begin Issuing Heat Advisories on or about J
une 2, 2025
Apr 29:
SCN25-38:
Discontinuation of the Daily Climate Report (CLISTO), Preliminary Monthly Climate Data (CF6STO) and Monthly Weather Summary (CLMSTO) for Sacramento City at WFO Sacramento, CA (STO) Starting on or about
June 1, 2025
Apr 25:
SCN25-31 Updated:
Probabilistic Tropical Cyclone Storm Surge (P- Surge) Model Upgrade: Effective
May 20, 2025
Apr 23:
SCN25-37:
NCEP Central Operations (NCO) Critical Weather Day (CWD) Status Webpage Update: Effective on or about 1800 UTC
April 28, 2025
Apr 17:
SCN25-36
: Temporary Reduction of Radiosonde Observations, from Selected Sites, Effective
April 17, 2025
Apr 16:
SCN25-35:
Discontinuation of HTTPS access to https://ftpprd.ncep.noaa.gov and https://ftp.ncep.noaa.gov effective
May 20, 2025
Apr 15:
SCN25-34 Updated:
Upgrade of National Blend of Models guidance effective
May 27, 2025
Apr 14:
SCN25-33:
NCEP Central Operations (NCO) Real Time Data Monitor (RTDM) Webpage URL Change: Effective on or about 1800 UTC
April 15, 2025
Apr 11:
SCN25-32 Updated:
Upgrade to SPC post processing for NCEP models, Effective
May 27, 2025
Apr 03:
SCN25-30 Updated:
Operational transition of the GOES-19 satellite to become GOES-East on or after
April 7, 2025
Mar 28:
SCN25-31 Updated:
Probabilistic Tropical Cyclone Storm Surge (P- Surge) Model Upgrade: Effective
May 20, 2025
Mar 20:
SCN25-28 Updated:
Changes to the Surf Zone Forecast (SRF) product for WFO Guam on
April 2, 2025
Mar 20:
SCN25-26 Updated:
Operational Implementation of the Addition of Most Probable Peak Intensity Tags to the Storm Prediction Center (SPC) Mesoscale Discussion on or about
March 25, 2025
Mar 18:
SCN25-30:
Operational transition of the GOES-19 satellite to become GOES-East on
April 4, 2025
Mar 17:
SCN25-18 Updated:
Additions and Changes to the station time series BUFR station lists for the GFS, RAP, and HRRR: Effective
March 25, 2025
Mar 17:
SCN25-29:
Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to version 5.1.1 Effective
March 26, 2025
Mar 14:
SCN23-09 Updated:
NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
Mar 13:
SCN25-28 Updated:
Changes to the Surf Zone Forecast (SRF) product for WFO Guam on
April 2, 2025
Mar 13:
SCN25-27:
Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Anniston Regional Airport in Anniston, AL (KANB) effective
May 27, 2025
Mar 12:
SCN25-26 Updated:
Operational Implementation of the Addition of Most Probable Peak Intensity Tags to the Storm Prediction Center (SPC) Mesoscale Discussion on or about
March 25, 2025
Mar 05:
SCN25-25:
Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model Implementation of Updated Naming Conventions per Executive Order 14172:
Effective March 12, 2025
Mar 04:
SCN25-24:
Changed codes in the Weather Prediction Center (WPC) Mesoscale Precipitation Discussion (FFGMPD): Effective on or
about May 19, 2025
Feb 27:
SCN25-23:
Operational Implementation of Updated Solar Cycle 25 Prediction Product: Effective
March 31, 2025
Feb 26:
SCN25-22:
Migration of the Tropical Weather Summary Information from Text Product Format to hurricanes.gov: Effective on or about
May 15, 2025
Feb 25:
SCN25-21:
Changes to National Weather Service (NWS) Shapefiles per Executive Order 14172: Effective
February 24, 2025
Feb 24:
SCN25-20:
Termination of the Weather Activity Planner: Effective
Immediately
Feb 24:
SCN25-19:
GLERL Adjustment to be Disabled in URMA as Part of the obsproc v1.2.3 Upgrade: Effective on or about
March 24, 2025
Feb 20:
SCN25-18 Updated:
Additions and Changes to the station time series BUFR station lists for the GFS, RAP, and HRRR: Effective
March 25, 2025
Feb 20:
SCN25-17 Updated:
Ceiling, Visibility, and Low Level Wind Shear (LLWS) Grids in NDFD will transition to Operational Status on
March 17, 2025
Feb 14:
SCN20-80 Updated:
Enhancements to the Winter Storm Severity Index (WSSI): Effective on or around
March 17, 2025
Feb 20:
SCN25-17 Updated:
Ceiling, Visibility, and Low Level Wind Shear (LLWS) Grids in NDFD will transition to Operational Status on
March 17, 2025
Feb 12:
SCN25-16:
The Experimental Hawaiian Extended Range Forecast Webpage Will Transition to Operational Status on
March 12, 2025
Feb 11:
SCN24-115 Updated:
Changes to Public and Fire Forecast Zones for WFO Tallahassee, FL: Effective
March 18, 2025
Feb 7:
SCN25-15:
Weather Surveillance Radar-1988 Doppler (WSR-88D) Kadena Air Base, Japan (RODN) Has Been Decommissioned
Feb 6:
SCN25-14:
Deployment of Preliminary GOES-19 Compact Coronagraph Images and Animations on or about
February 6, 2025
Feb 4:
SCN24-70 Updated:
Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective
March 18, 2025
Jan 31:
SCN25-13:
Upgrade to GOES-R Enterprise Rain Rate Algorithm on SBN on or about
March 3, 2025
Jan 30:
SCN25-12:
Replacing the Imperial Unit Feet with the Metric Unit Meter in National Marine Center High Seas Text and Graphical Products on or about
May 15, 2025
Jan 30:
SCN25-11:
Discontinuation of the Intermediate (IM) Daily Climatological Report (CLICYS) and Rescheduling of the Issuance Time for the Evening (PM) Daily Climatological Report at WFO Cheyenne, WY (CYS): Starting on or about
March 1, 2025
Jan 28:
SCN25-10:
Migration of tsunami.gov Website to a New Server Platform on or about
February 10, 2025
Jan 27:
SCN25-09:
Enforce TLS 1.2 or Higher on NCEP Hosted Sites: Effective
July 8, 2025
Jan 22:
SCN25-08:
Changes to the Post Tropical Cyclone Report (PSH) to Identify Top Wind Gusts: Effective on or about
May 15, 2025
Jan 22:
SCN25-07:
NWS is Changing the Issuance Criteria for Tropical Cyclone Advisory Products for Potential Tropical Cyclones: Effective on or about
May 15, 2025
Jan 22:
SCN25-06:
NWS is Extending the 64-kt Wind Radii Forecasts to Day 3 in the Tropical Cyclone Forecast/Advisory Product (TCM): Effective on or about
May 15, 2025
Jan 16:
SCN25-05:
NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXM82, Egremont, Massachusetts: Effective on or before
February 28, 2025
Jan 15:
SCN25-04:
Operational Deployment of the Global Total Electron Content (GloTEC) Ionosphere Model: Effective on or about
February 18, 2025
Jan 13:
SCN25-03:
Activation of Advected Layer Precipitable Water (ALPW) on the Satellite Broadcast Network on or about
March 28, 2025
Jan 8:
SCN25-02:
Use of Mixed-Case Text/95 ASCII Character Set in the NWS Weather Prediction International Desk’s Forecast Discussions: Effective
February 10, 2025
Jan 7:
SCN25-01:
Retirement of Select Aviation Area Forecasts (FAs): Effective
January 27, 2025
Service Change Notices 2024
Dec 23:
SCN24-120:
NOAA Weather Radio All Hazards (NWR) Service Termination from Station WXN81, Ulysses, Kansas: Effective on or before
12/31/2024
Dec 23:
SCN24-119:
Refinements to Public and Fire Weather Forecast Zones for WFO Fairbanks, AK: Effective
March 18, 2025
Dec 23:
SCN24-118:
Changes to Marine Forecast Zones for WFO San Diego, CA: Effective
March 18, 2025
Dec 23:
SCN24-117:
Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Hennepin County, Minnesota: Effective on or about
March 18, 2025
Dec 23:
SCN24-116:
Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Boulder County, Colorado: Effective on or about
March 18, 2025
Feb 11, 2025:
SCN24-115 Updated:
Changes to Public and Fire Forecast Zones for WFO Tallahassee, FL: Effective
March 18, 2025
Dec 23:
SCN24-114:
Changes to Public and Fire Weather Zones for NWS Jacksonville, FL: Effective
March 18, 2025
Dec 23:
SCN24-113:
Changes to Public and Fire Forecast Zones for WFO Baltimore, MD/Washington, DC: Effective on or about
March 18, 2025
Dec 23:
SCN24-112:
Changes to Fire Weather Forecast Zones for WFO Boise, ID: Effective
March 18, 2025
Dec 23:
SCN24-111:
Changes to Marine Weather Forecast Zones for WFO Tallahassee, FL: Effective
March 18, 2025
Dec 23:
SCN24-110:
Refinements to Public and Fire Weather Forecast Zones for WFO Juneau, AK: Effective
March 18, 2025
Feb 4, 2025:
SCN24-70 Updated:
Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective
March 18, 2025
Dec 23:
SCN24-69 Updated:
Changes to Public Forecast Zones for WFO Seattle, WA: Effective
March 18, 2025
Dec 23:
SCN24-68 Updated:
Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective
March 18, 2025
Dec 20:
SCN24-109:
Discontinuation of the Max/Min Temperature and Precipitation Table Product for all NWS Central Region Offices: Effective
January 31, 2025
Dec 20:
SCN24-108:
Termination of the 72-Hour Low Tracks Graphic and the Non-Technical 72-Hour Low Tracks Graphic to be Replaced by Automated Low Clusters Forecast Tool: Effective
January 20, 2025
Dec 20:
SCN24-107:
Discontinuation of Haines Index and Lightning Activity Level (LAL) as Fire Weather Forecast Elements in Fire Weather Products: Effective on or about
February 1, 2025
Dec 18:
SCN24-106 Updated: RESCINDED:
Discontinuation of Terminal Aerodrome Forecast (TAF) Service for Anniston Regional Airport in Anniston, AL (KANB)
Dec 18:
SCN24-105 Updated:
Operational Implementation of Key Messages on or about
January 16, 2025
Dec 16:
SCN24-104:
The Experimental Weeks 3-4 Precipitation Outlooks Will Become Operational on or about
January 17, 2025
Dec 12:
SCN24-99 Updated:
Addition of SAUS99 and SPUS99 Text Products to Satellite Broadcast Network (SBN) and Removal of the SAUS70, 80 and 90 Counterparts on or about
January 27, 2025
Nov 19:
SCN24-103:
Update to the Marine Beach Forecast Summary Service: Effective on or after
December 16, 2024
Nov 15:
SCN24-102:
Addition of Avalanche Warning for the San Francisco Peaks and Kachina Peaks Wilderness in Arizona beginning
December 16, 2024
Oct 29:
SCN24-101:
Minor RTMA and URMA Upgrade to Version 2.10.9 (RTMA) and 2.10.7 (URMA): Effective on
October 29, 2024
Oct 21:
SCN24-100:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective
December 9, 2024
Dec 12:
SCN24-99 Updated:
Addition of SAUS99 and SPUS99 Text Products to Satellite Broadcast Network (SBN) and Removal of the SAUS70, 80 and 90 Counterparts on or about
January 27, 2025
Oct 18:
SCN24-98:
The Coastal Waters Forecast Product from the Weather Forecast Office (WFO) in Guam Will Include Additional Wave Information on or about
November 4, 2024
Oct 17:
SCN24-97:
Addition of National Fire Danger Rating System (NFDRS) Forecasts from the National Weather Service (NWS) Honolulu Forecast Office (HFO): Effective
Immediately
Oct 15:
SCN24-96:
Improvements Made to the World Coordinate System Metadata in GONG H-Alpha Imagery on or about
October 16, 2024
Oct 15:
SCN24-95:
Changes to NOAA Weather Radio All Hazards (NWR) Radio Frequency for Safford, AZ (KXI24): Effective on or about
November 18, 2024
Dec 23:
SCN24-69 Updated:
Changes to Public Forecast Zones for WFO Seattle, WA: Effective
March 18, 2025
Oct 1:
SCN24-94:
Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0.8: Effective
October 1, 2024
Oct 1:
SCN24-93:
Discontinuation of the Texas/Oklahoma Panhandles Supplementary Observations (AGO) Product: Effective
October 31, 2024
Sep 26:
SCN24-92:
Retirement of the Airmen’s Meteorological Information (AIRMET) over CONUS: Effective on or about
January 27, 2025
Sep 26:
SCN24-91:
Termination of Terminal Aerodrome Forecast (TAF) at Troy Municipal Airport, Troy, AL (KTOI): Effective on or around
October 1, 2024
Sep 24:
SCN24-80 Updated:
Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about
September 30, 2024
Sep 23:
SCN24-90:
Changes to the Atlantic Tropical Weather Discussion Issuance Times: Effective on or about
December 2, 2024
Sep 16:
SCN24-89:
Upgrade of the Real Time Ocean Forecast System (RTOFS) to Version 2.4: Effective
September 13, 2024
Sep 10:
SCN24-77 Updated:
NOS Operational Forecast System (OFS) Framework Version Updates and Implementation of Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River: Effective on or about
September 16, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Sep 5:
SCN24-88:
Renaming of Excessive Heat Watch and Warning to Extreme Heat Watch and Warning: Effective
March 4, 2025
Sep 3:
SCN24-87
: Addition of NWS Common Alerting Protocol version 1.2 messages to NOAA Weather Wire Service Open Interface (NWWS-OI): Effective on or around
September 3, 2024
Aug 29:
SCN24-75 Updated:
Changes in NWS Hazard Map Warning, Watch, Advisory (WWA) Colors and Priorities: Effective
October 1, 2024
Aug 29:
SCN24-86:
Implementation of TAF Service for Half Moon Bay Airport (KHAF) in California: Effective
October 22, 2024
Aug 28:
SCN24-85:
Updated PROB30 Usage in the Terminal Aerodrome Forecast (TAF): Effective on or about
September 30, 2024
Aug 27:
SCN24-84:
Two New NOAA Weather Radio All Hazards (NWR) Transmitters in the Texas Panhandle become operational: Effective on or about
October 1, 2024
Aug 27:
SCN24-83:
New NOAA Weather Radio All Hazards (NWR) Broadcast begins from Station WZ2559, Enterprise, Oregon: Effective on or about
October 1, 2024
Dec 23:
SCN24-69 Updated:
Changes to Public Forecast Zones for WFO Seattle, WA: Effective
March 18, 2025
Sep 24:
SCN24-80 Updated:
Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about
September 30, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Aug 20:
SCN24-72 Updated:
Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 23.0 Beta Test to Begin the
Week of August 25, 2024
Dec 23:
SCN24-68 Updated:
Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective
March 18, 2025
Feb 4, 2025:
SCN24-70 Updated:
Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective
March 18, 2025
Aug 20:
SCN24-82:
Experimental Global Tropics Hazards Outlook for Week-3 will Transition to Operational Status on
September 19, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Aug 14:
SCN24-81:
Implementation of TAF Service for the South Valley Regional Airport (KSVR) in Utah: Effective
October 29, 2024
Sep 24:
SCN24-80 Updated:
Changes and Additions to LAMP Station-based and Gridded Guidance: Effective on or about
September 30, 2024
Aug 5:
SCN24-79:
Deployment of an Update to the GOES Proton Flux Plot on or about
August 6, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Aug 2:
SCN24-78:
The National GIS Map Viewer (the “Viewer”) Marine Program Site will become Operational: Effective on or about
Monday, August 5, 2024
Sep 10:
SCN24-77 Updated:
NOS Operational Forecast System (OFS) Framework Version Updates and Implementation of Oceanographic Forecast Modeling Systems for the Salish Sea and Columbia River: Effective on or about
September 16, 2024
Jul 29:
SCN24-76:
Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 5.1: Effective
July 30, 2024
Aug 29:
SCN24-75 Updated:
Changes in NWS Hazard Map Warning, Watch, Advisory (WWA) Colors and Priorities: Effective
October 1, 2024
Jul 19:
SCN24-74
: Initiation of an Afternoon Issuance of the Day 3 Convective Outlook, Issued by the NWS Storm Prediction Center: Effective on or about
August 20, 2024
Jul 10:
SCN24-73:
Change to NEXRAD Level III Product Dissemination on or around
September 16, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Aug 20:
SCN24-72 Updated:
Weather Surveillance Radar-1988 Doppler (WSR-88D) RDA/RPG Build 23.0 Beta Test to Begin the
Week of August 25, 2024
Jul 3:
SCN24-71:
Upgrade to RIDGE II (radar.weather.gov) Enhanced and Standard (Low Bandwidth) Images: Effective
July 2, 2024
Feb 4, 2025:
SCN24-70 Updated:
Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective
March 18, 2025
Jun 27:
SCN24-65 Updated:
Upgrade NCEP Global Forecast System to v16.3.16: Effective
July 2, 2024
Feb 4, 2025:
SCN24-70 Updated:
Changes to Public Weather and Fire Weather Forecast Zones for WFO Anchorage, AK: Effective
March 18, 2025
Dec 23:
SCN24-69 Updated:
Changes to Public Forecast Zones for WFO Seattle, WA: Effective
March 18, 2025
Dec 23:
SCN24-68 Updated:
Changes to Fire Weather Forecast Zones for WFO Pendleton, OR: Effective
March 18, 2025
Jun 26:
SCN24-67:
Decommissioning of w2.weather.gov on or about
July 23, 2024
Jun 24:
SCN24-66:
Termination of the Day 3-7 Hemispheric Charts: Effective
July 24, 2024
Jun 27:
SCN24-65 Updated:
Upgrade NCEP Global Forecast System to v16.3.16: Effective
July 2, 2024
Jun 13:
SCN24-64:
Upgrade to Hurricane Analysis and Forecast System (HAFS): Effective
July 16, 2024
Jun 1:
SCN24-63:
Decommissioning of the NOAA Profiler Network (NPN): Effective
July 11, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
Jun 4:
SCN24-44 Updated:
Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective
June 4, 2024
Jun 3:
SCN24-50 Updated:
Migration of JSON and DWML Data Services to NWS’s API Application at api.weather.gov and Removal from forecast.weather.gov: Effective
TBD
May 31:
SCN24-62:
Limiting Tropical Information in High Seas Forecasts from 120 Hours to Only the First 48 Hours: Effective
June 26, 2024
May 31:
SCN24-61:
Discontinuation of the Max/Min Temperature and Precipitation Table Product for all NWS Southern Region Offices: Effective
July 1, 2024
May 28:
SCN24-60:
New Data Available Publicly on NCEP Web Services: GFS, GDAS, and RAP BUFR Observations and US Navy HYCOM: Effective
May 22, 2024
May 22:
SCN24-43 Updated:
Migration of All Real-time LAMP and Gridded LAMP Webpages and One Storm Surge Webpage to New Web Server: Effective on or about
June 10, 2024
May 22:
SCN24-59:
Spot Application Upgrade: Effective
June 25, 2024
May 22:
SCN24-58:
NWS to Decommission the User-Defined Area Forecast (UDAF) Service and Webpage: Effective
June 27, 2024
May 21:
SCN24-57:
New NOAA Weather Radio All Hazards (NWR) Broadcast Begins from Station KAE42, Providence Forge, VA on
June 21, 2024
May 21:
SCN24-56:
National Tsunami Hazards Mitigation Program Website Will Move to New Web Address on or about
June 19, 2024
May 20:
SCN24-55:
Upgrade NWS API Website Forecast and Alerts Endpoints: Effective
June 20, 2024
Sep 9:
SCN24-54 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN) Channel Alignment: Effective on or about
September 16, 2024
May 16:
SCN24-53:
Operational Implementation of the updated Electric Power Dashboard Webpage on or about
May 16, 2024
May 16:
SCN24-52:
The National GIS Map Viewer (the “Viewer”) Tropical Program Site Will Become Operational: Effective on or about
May 21, 2024
May 16:
SCN24-51:
NWS Mobile Site Decommissioning: Effective
June 26, 2024
Jun 4:
SCN24-44 Updated:
Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective
June 4, 2024
Jun 3:
SCN24-50 Updated:
Migration of JSON and DWML Data Services to NWS’s API Application at api.weather.gov and Removal from forecast.weather.gov: Effective
TBD
May 3:
SCN24-49:
Termination of TPEX Introduction Webpage: Effective
June 13, 2024
May 2:
SCN24-40 Updated:
Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0: Effective on or about
May 14, 2024
May 2:
SCN24-48:
Cooperative Hurricane Upper Air Stations (CHUAS) to Transition from the GRAW DFM09 to the GRAW DFM17 (Capless) Radiosonde and Supporting Software Version by
July 27, 2024
May 2:
SCN24-47:
Moving Downtown Los Angeles, CA Weather Observations Site to the Frank Hotchkin Memorial Training Center on
May 20, 2024
May 2:
SCN24-46:
Correcting Station Locations for KGVW and MMML in the National Blend of Models (NBM) v4.1 Text Message Product: Effective
April 29, 2024
May 1:
SCN24-45:
Removal of Surface Observations from NWS API Website: Effective
April 24, 2024
Jun 4:
SCN24-44 Updated:
Migrate NWS weather.gov Website to New Infrastructure and Decommission Websites/URLs: Effective
June 4, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
May 22:
SCN24-43 Updated:
Migration of All Real-time LAMP and Gridded LAMP Webpages and One Storm Surge Webpage to New Web Server: Effective on or about
June 10, 2024
Apr 17:
SCN24-34 Updated:
NOAA-21 NUCAPS Soundings to be Added to the Satellite Broadcast Network (SBN) on or near
May 9, 2024
Apr 16:
SCN24-42:
The “Rapid Onset Drought” Hazard Type Within the 8- to 14-Day Hazards Outlook (Contiguous U.S. and Alaska) Will Transition to Operational Status: Effective
May 16, 2024
Apr 11:
SCN24-41:
Upgrade of National Blend of Models Guidance: Effective
May 15, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
May 2:
SCN24-40 Updated:
Upgrade of the National Air Quality Forecast Capability (NAQFC) to the Air Quality Modeling (AQM) System Version 7.0: Effective on or about
May 14, 2024
Apr 5:
SCN24-39:
Termination of the Hydrologic Summary (RVA): Effective
April 16, 2024
Apr 5:
SCN24-38:
Changes to the 24-Hour Surface and Wind and Wave Forecast Charts Issued by the Ocean Prediction Center: Effective on or around
June 3, 2024
Apr 4:
SCN24-20 Updated:
Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about
April 17, 2024
Apr 3:
SCN24-37:
Station Changes in GOES-R ASOS Satellite Cloud Products: Effective
June 2, 2024
Apr 3:
SCN24-36:
Upgrade to SPC Post Processing for NCEP Models: Effective
May 7, 2024
Apr 2:
SCN24-35:
Termination of Great Lakes Ice Concentration GRIB File: Effective
May 1, 2024
Apr 1:
SCN24-32 Updated:
Transition of NOAA Weather Wire Service Open Interface (NWWS-OI) to New Infrastructure: Effective
April 23, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
Apr 17:
SCN24-34 Updated:
NOAA-21 NUCAPS Soundings to be Added to the Satellite Broadcast Network (SBN) on or near
May 9, 2024
Mar 26:
SCN23-44 Updated:
Implementation of Consolidated NWS Public Weather Program Products Related to Cold: Effective on or about
October 1, 2024
Mar 20:
SCN24-33:
Minor RTMA Upgrade to Version 2.10.7: Effective on or about
April 08, 2024
Apr 1:
SCN24-32 Updated:
Transition of NOAA Weather Wire Service Open Interface (NWWS-OI) to New Infrastructure: Effective
April 23, 2024
Mar 20:
SCN24-31:
Reinstatement of Marine Local Storm Report Event Types on or about
March 26th, 2024
Mar 11:
SCN24-30:
Upgrade NWS Forecast and Marine Weather Websites to New Infrastructure and Decommission Spanish Translation Webpages: Effective
April 30, 2024
, with a 7-hour Test on
April 11, 2024
Mar 6:
SCN24-29:
Changes to Uniform Resource Locators (URLs) Associated with the Operational Implementation of the National Water Prediction Service (NWPS) on
March 27, 2024
Mar 4:
SCN24-28:
Implementation of New Interactive Text Message Response System (ITMRS) for NOAA Weather Radio All Hazards (NWR): Effective
April 4, 2024
Feb 29:
SCN24-27:
The Modernized Drought Information Statement Will Transition to Operational Status: Effective
April 1, 2024
Feb 27:
SCN24-26:
Change in Issuing Office and Product Identifiers for Spanish-Translated Tropical Weather Outlooks and Tropical Cyclone Public Advisories for the Atlantic Basin on or around
May 15, 2024
Feb 26:
SCN24-25:
Changes to Issuance of U.S. Tropical Watches/Warnings on Intermediate Advisories, Inclusion of Links in the Tropical Cyclone Public Advisories, and Updates to the Time Zone Referenced in the Eastern Pacific Tropical Cyclone Forecast Products:
Beginning May 15, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
Feb 23:
SCN24-24:
Changes to the host URLs for Hurricane Threats and Impacts (HTI) Graphics in Keyhole Markup Language (KML) Format: Effective
Immediately
Feb 23:
SCN24-23:
Changes to the Environmental Modeling Center Website with the Implementation of the Environmental Modeling Center Verification System (EVS) Version 1.0: Effective on or about
March 26, 2024
Apr 4:
SCN24-20 Updated:
Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about
April 17, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
Feb 22:
SCN24-22:
NWS is Extending the 34- and 50-kt Wind Radii Forecasts from 3 Days to 5 Days in the Tropical Cyclone Forecast/Advisory Product (TCM): Effective on or about
May 15, 2024
Feb 22:
SCN24-21:
Minor RTMA Upgrade to Version 2.10.6: Effective on or about
February 26, 2024
Apr 4:
SCN24-20 Updated:
Provision of Full-Resolution National Digital Forecast Database (NDFD) Data and Air Quality National Digital Guidance Database (NDGD) via Amazon Web Services (AWS) Transitioning to Operational Status on or about
April 17, 2024
Feb 21:
SCN24-19:
The National Centers for Environmental Prediction (NCEP) Climate Prediction Center (CPC) will Change the Depiction and Output Formats of Several Ultraviolet Index (UVI) Product Graphics on or about
May 25, 2024
Feb 14:
SCN24-18:
Addition of HRRR and HRRRDAS files to NOMADS/FTPPRD Web Services: Effective
February 14, 2024
Feb 14:
SCN24-17:
The Coastal Waters Forecast with Experimental Wave Component Detail Will Expand to All Coastal NWS WFOs and Transition to Operational in a Phased Implementation from April through
May 2024
Feb 12:
SCN24-16:
National Hurricane Center (NHC) Tropical Cyclone JavaScript Object Notation File Changes: Effective on or about
May 15, 2024
Feb 9:
SCN24-15:
Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 5.0: Effective
March 13, 2024
Feb 7:
SCN24-14:
Metop-C NUCAPS Soundings to be Added to the Satellite Broadcast Network on or near
March 8, 2024
Feb 6:
SCN24-13:
The Pacific Tsunami Center Will Issue Tsunami Products with Updated Spanish Language Geographic Area Titles for Puerto Rico and the United States Virgin Islands and British Virgin Islands: Effective
March 21, 2024
Feb 6:
SCN24-12:
Termination of Old NWS Warnings Webpage: Effective
March 5, 2024
Jan 25:
SCN24-11:
Hammond, LA WSR-88D (KHDC) to Begin NEXRAD Level III Product Dissemination on or around
March 31, 2024
Jan 24:
SCN24-10:
The National Weather Service Began Operational Use of Inmarsat’s SafetyNET II for Broadcasts of METAREA IV and XII High Seas Forecasts and Warnings on
January 22, 2024
Jan 24:
SCN24-09:
Change to NEXRAD Level III Product Dissemination on or around
March 4, 2024
Jan 24:
SCN24-08:
Discontinuation of the 18Z issuance of the Regional Temperature and Precipitation Summary and rescheduling for 16Z on or about
February 12, 2024
with COOP Reports Only
Jan 23:
SCN24-07:
Aviation Tropical Cyclone Advisory (TCA) to Add a 6-hour Forecast: Beginning on or about
May 15, 2024
Jan 22:
SCN23-121 Updated:
alerts.weather.gov version 2.3.0 Upgrade: Effective on or about
February 14, 2024
Jan 18:
SCN24-06:
Discontinuing Dial-a-Buoy Interactive Voice Response System, Effective
March 17, 2024
Jan 18:
SCN24-05:
Automated Radiosonde Observing System (AROS) Sites to Transition from the Vaisala RS41-SGP Radiosonde to the RS41-SG Radiosonde by
May 31, 2024
Apr 22:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
Jan 16:
SCN24-04:
Updated Issuance Time and Format for the Tropical Weather Discussion (TWD) Issued Daily by WFO Guam: Effective on or about
June 3, 2024
Jan 12:
SCN24-03:
Replacement of the Advanced Hydrologic Prediction Service (AHPS) Website with the National Water Prediction Service (NWPS) Website on or about
March 27, 2024
Jan 11:
SCN24-02:
New Forecast Product “Offshore Waters Forecast for SW N Atlantic Ocean” Will Start on
March 26, 2024
Jan 3:
SCN24-01:
Approval of Service Description Document Version 2 Describing NWS Impact-based Decision Support Services: Effective
January 3, 2024
Service Change Notices 2023
Apr 22, 2024:
SCN23-124 Updated:
Upgrade of the Surge and Tide Operational Forecast System (STOFS): Effective
May 14, 2024
Dec 21:
SCN23-123:
Implementation of Terminal Aerodrome Forecast (TAF) Service for KRGA - Central Kentucky Regional Airport, Richmond, KY: Effective
March 5, 2024
Dec 21:
SCN23-122:
NWS Alerts Atomic Syndication Format (ATOM) Data Changes: Effective on or about
January 31, 2024
Jan 22, 2024:
SCN23-121 Updated:
alerts.weather.gov version 2.3.0 Upgrade: Effective on or about
February 14, 2024
Dec 21:
SCN23-120:
Changes to Public and Fire Weather Forecast Zones for WFO Miami, FL: Effective
March 5, 2024
Dec 21:
SCN23-119:
Changes to Fire Forecast Zones for WFO Fairbanks, AK: Effective
March 5, 2024
Dec 21:
SCN23-118:
Changes to Fire Weather Forecast Zones for WFO Honolulu, HI: Effective
March 5, 2024
Dec 21:
SCN23-117:
Changes to Fire Weather Zones for WFO Portland, OR: Effective
March 5, 2024
Dec 21:
SCN23-116:
Changes to Public Forecast Zones for WFO Portland, OR: Effective
March 5, 2024
Dec 21:
SCN23-115:
Changes to Public and Fire Forecast Zones for WFO Jacksonville, FL: Effective
March 5, 2024
Dec 21:
SCN23-114:
Changes to Pacific Offshore Marine Forecast Zone Boundaries: Effective
March 5, 2024
Dec 21:
SCN23-113:
Refinements to Public, Marine, and Fire Weather Forecast Zones for WFO Juneau, AK: Effective
March 5, 2024
Dec 14:
SCN23-112:
Minor RTMA and URMA Upgrade to Version 2.10.5: Effective on or about
January 24, 2023
Dec 14:
SCN23-111:
Change to Global Aviation Products Related to the World Area Forecast System (WAFS) Product on or about
January 17, 2024
Dec 5:
SCN23-110:
Termination of Certain Web Graphics Being Produced by EMC: Effective
January 5, 2024
Nov 28:
SCN23-109:
Discontinuation of the Temperature and Precipitation Summary for Deep South Texas: Effective
January 9, 2024
Nov 28:
SCN23-62 Updated:
Temporary Removal of Canadian Radars from the Multi-Radar Multi-Sensor (MRMS) System: Effective
June 5, 2023
Nov 16:
SCN23-73 Updated:
Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Sonoma County, California: Effective on or after
September 19, 2023
Nov 16:
SCN23-108:
The Experimental Probabilistic Winter Storm Severity Index (WSSI-P) Will Become Operational on
December 15, 2023
Nov 16:
SCN23-107:
Discontinuation of the Experimental Lake Effect Snow (LES) Warning Polygons from NWS Weather Forecast Offices (WFOs) Buffalo, NY, Binghamton, NY and Albany, NY on or about
December 16, 2023
Nov 16:
SCN23-106:
Operational Implementation of Storm Prediction Center (SPC) Day 1 Convective Outlook with Severe Timing Guidance and Graphic Displays on or about
December 16, 2023
Nov 13:
SCN23-105:
NWS to Redirect and Decommission Enhanced Data Display: Effective
November 29, 2023
Feb 14, 2025:
SCN20-80 Updated:
Enhancements to the Winter Storm Severity Index (WSSI): Effective on or around
March 17, 2025
Nov 2:
SCN23-104:
Upgrade of the North American Ensemble Forecast System (NAEFS) to Version 7.0: Effective
December 5, 2023
Oct 25:
SCN23-103:
Discontinuation of the Max/Min Temperature and Precipitation Table Product for New Mexico: Effective Tuesday,
December 5, 2023
Oct 20:
SCN23-93 Updated:
GOES-East/West Cloud Cover Layers to be Added to the Satellite Broadcast Network on or after
October 23, 2023
Oct 19:
SCN23-09 Updated:
NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
Oct 19:
SCN23-102:
Transition of the Radiosonde Replacement System (RRS) at Albany, NY to the 403 MHz Manual Radiosonde Observation System (MROS) on or about
October 25, 2023
Oct 16:
SCN23-101:
Termination of the Weather Prediction Center Day 3-7 Hazards Outlook Discussion: Effective
November 15, 2023
Oct 13:
SCN23-100:
Implementation of Terminal Aerodrome Forecast (TAF) Service for Durant Regional Airport – Eaker Field (KDUA), Durant OK: Effective
November 1, 2023
Oct 12:
SCN23-99:
Upgrade Ultraviolet Index (UVI) Forecast: Effective
November 14, 2023
Oct 6:
SCN23-98:
Discontinuation of the Experimental Days 3-7 Winter Storm Threat Index from NWS Weather Forecast Offices (WFOs) Baltimore, MD/Washington DC, State College, PA and Wakefield, VA on or about
November 6, 2023
Oct 2:
SCN23-79 Updated:
Upgrade of Aviation Weather Center Website on
October 16, 2023
Sep 28:
SCN23-97:
Deployment of and Update to the Kp>7 Warning to Remove the Adjectival Description on or about
September 28, 2023
Sep 28:
SCN23-96:
Change to NEXRAD Level III Product Dissemination on or around
November 13, 2023
Sep 28:
SCN23-95:
Hurricane Analysis and Forecast System Upgrades (HAFSv1.0.5): Effective
October 4, 2023
Sep 26:
SCN23-94:
Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model Station Post-processing Updates: Effective
September 27, 2023
Oct 20:
SCN23-93 Updated:
GOES-East/West Cloud Cover Layers to be Added to the Satellite Broadcast Network on or after
October 23, 2023
Sep 11:
SCN23-92:
New Stations Added to GOES-R ASOS Satellite Cloud Products as of
August 11, 2023
Oct 2:
SCN23-79 Updated:
Upgrade of Aviation Weather Center Website on
October 16, 2023
Aug 31:
SCN23-61 Updated:
Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on
August 24, 2023
Aug 29:
SCN23-91:
NWS to Replace Digital Marine Weather Dissemination System (DMAWDS) with New Ship Weather Observation Form: Effective
September 28, 2023
Aug 29:
SCN23-90:
Climate Prediction Center (CPC) Operational 6-10 Day and 8-14 Day Temperature and Precipitation Outlooks Maps Will Begin Including Hawaii on or about
October 3, 2023
Aug 18:
SCN23-76 Updated:
Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective
September 20, 2023
Aug 14:
SCN23-89:
Experimental Deployment of International Civil Aviation Organization (ICAO) Space Weather Advisories on or about
August 14, 2023
Aug 31:
SCN23-61 Updated:
Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on
August 24, 2023
Aug 9:
SCN23-88:
WSR-88D RDA/RPG Build 22.0 Beta Test to Begin on
August 14, 2023
Aug 1:
SCN23-87:
Corrections to Public and Fire Weather Forecast Zones for WFO Riverton, WY: Effective
September 19, 2023
Jul 28:
SCN23-86:
Removal of AutoNowCaster Products from the Multi-Radar, Multi-Sensor Application: Effective
September 6, 2023
Jul 27:
SCN23-85:
National Data Buoy Center (NDBC) will be Modifying the File Format and Filenames of Files Available for Download via Their Website: Effective on or about
August 15, 2023
Jul 27:
SCN23-84:
Termination of Certain Web Graphics Being Produced by EMC: Effective
August 28, 2023
Jul 24:
SCN23-83:
Implementation of TAF Service for Ontario Municipal Airport (KONO), Oregon: Effective
September 12, 2023
Aug 18:
SCN23-76 Updated:
Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective
September 20, 2023
Jul 19:
SCN23-82:
Changes to NWS Common Alerting Protocol (CAP) Message Availability via the Federal Emergency Management Agency (FEMA) Integrated Public Alert and Warning System (IPAWS): Effective on or after
July 20, 2023
Jul 18:
SCN23-70 Updated:
The Climate Prediction Center (CPC) Operational Drought Outlooks (DOs) will Begin Including the U.S. Virgin Islands on or about
August 17, 2023
Mar 26:
SCN23-44 Updated:
Implementation of Consolidated NWS Public Weather Program Products Related to Cold, Effective on or about
October 1, 2024
Jul 13:
SCN23-81:
Removal of the Radar Coded Message 74/RCM from RPCCDS on or about
August 20, 2023
Jul 7:
SCN23-72 Updated:
Changes to Public Forecast Zones for WFO El Paso, TX: Effective
September 19, 2023
Jul 7:
SCN23-80:
Probabilistic Extra-Tropical Storm Surge (P-ETSS) Model Upgrade and Extra-Tropical Storm Surge (ETSS) Model Upgrade: Effective
August 15, 2023
Oct 2:
SCN23-79 Updated:
Upgrade of Aviation Weather Center Website on
October 16, 2023
Jun 29:
SCN23-78:
Changes to Public and Fire Weather Forecast Zones for WFO Fairbanks, AK: Effective
September 19, 2023
Jun 29:
SCN23-77:
Changes to Public Forecast Zones for WFO Anchorage, AK: Effective
September 19, 2023
Aug 18:
SCN23-76 Updated:
Upgrade of National Water Model on NCEP’s WCOSS System and its Post-processing Application on the Integrated Dissemination Platform (IDP): Effective
September 20, 2023
Jun 29:
SCN23-75:
Change to Fire Zone for WFO Pittsburgh, PA: Effective
September 19, 2023
Jun 29:
SCN23-74:
Changes to Public Forecast Zones for WFO Rapid City, SD: Effective
September 19, 2023
Nov 16:
SCN23-73 Updated:
Implementation of Partial County Alerting via NOAA Weather Radio All Hazards (NWR) and the Emergency Alert System (EAS) for Sonoma County, California: Effective on or after
September 19, 2023
Jul 7:
SCN23-72 Updated:
Changes to Public Forecast Zones for WFO El Paso, TX: Effective
September 19, 2023
Jun 29:
SCN23-71:
Discontinuation of NWS Honolulu, HI’s Route Forecast (ROFOR): Effective
July 31, 2023
Jul 18:
SCN23-70 Updated:
The Climate Prediction Center (CPC) Operational Drought Outlooks (DOs) will Begin Including the U.S. Virgin Islands on or about
August 17, 2023
Jun 26:
SCN23-69:
Implementation of the Upgrade of the Whole Atmosphere Model-Ionosphere Plasmasphere Electrodynamics Model (WAM-IPE) Forecast System (WFS) to Version 1.2: Effective
August 1, 2023
Jun 21:
SCN23-68:
Operational Implementation of the US-Canada 1D Geoelectric Model on
June 21, 2023
Jun 21:
SCN23-67:
NWSChat 2.0 Application will Transition to Operations on or about
August 1, 2023
Aug 10:
SCN23-61 Updated:
Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images on or about
August 22, 2023
Jun 13:
SCN23-66:
The National Weather Service Began Operational Use of Iridium’s SafetyCast for Broadcasts of METAREA IV and XII High Seas Forecasts and Warnings on
June 12, 2023
Jun 9:
SCN23-65:
Update and Migration of National Weather Service Products and Services Catalog: Effective
June 9, 2023
Jun 9:
SCN23-64:
NOAA-21 VIIRS Imagery to be Added to the Satellite Broadcast Network on or after
July 10, 2023
Jun 7:
SCN23-63:
JetStream - the National Weather Service Online Weather School URL Change: Effective
June 7, 2023
Nov 28:
SCN23-62 Updated:
Temporary Removal of Canadian Radars from the Multi-Radar Multi-Sensor (MRMS) System: Effective
June 5, 2023
Aug 31:
SCN23-61 Updated:
Changes to RIDGE II Enhanced (radar.weather.gov) and Standard (Low Bandwidth) Images Implemented on
August 24, 2023
May 25:
SCN23-60:
Go-Live of New NCEP Hurricane Model, HAFS and Future Decommissioning of Legacy Hurricane Systems: Effective
June 27, 2023
May 18:
SCN23-31 Updated:
Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about
May 31, 2023
May 15:
SCN23-59:
Changes to ‘Alaska Weather’ Television Program and Soliciting Comments on Future Service Changes through
July 30, 2023
May 12:
SCN23-58:
Notification of Removal of AddThis from forecast.weather.gov and marine.weather.gov: Effective
May 30, 2023
May 10:
SCN23-09 Updated:
NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
May 4:
SCN23-57:
Termination of Common Alerting Protocol Version 1.1 (CAP v1.1): Effective no sooner than
January 8, 2024
May 4:
SCN23-50 Updated:
Changes to LAMP Station-Based and Gridded Guidance: Effective
June 6, 2023
May 4:
SCN23-49 Updated:
Changes to the GFS-based Model Output Statistics (MOS) Guidance: Effective
June 6, 2023
May 2:
SCN23-42 Updated:
Activation of GOES-East/West Ice and Snow Products on the Satellite Broadcast Network (SBN) on or after
June 5, 2023
May 2:
SCN23-56:
Notification of Upgrade to the Model Analyses and Guidance (MAG) Website to Version 4.0: Effective
May 31, 2023
May 1:
SCN23-55:
Operational Implementation of the Excessive Rainfall Outlook for Days 4-5 on or about
June 1, 2023
Apr 25:
SCN23-54:
Discontinuing Marine Service Chart MSC-15 for the Alaskan Waters: Effective
April 26, 2023
Apr 25:
SCN23-53:
Changes to the Weather Prediction Center Day 3-7 Hazards Outlook: Effective
June 23, 2023
Apr 24:
SCN23-52:
Correcting National Blend of Models (NBM) Low-Level Wind Shear (LLWS) Height Calculation, and Other Minor Fixes to NBM v4.1: Effective on or about
April 25, 2023
Apr 21:
SCN23-46 Updated:
Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrade:
Effective May 2, 2023
Apr 20:
SCN23-08 Updated:
Change to Significant Meteorological Information (SIGMET) Format at a
Date to be Determined
Apr 19:
SCN23-51:
Discontinuing the Forecasts of High Pressure Systems in the High Seas Text Forecasts Issued by WFO Honolulu, HI and the Ocean Prediction Center: Effective
May 17, 2023
May 18:
SCN23-31 Updated:
Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about
May 31, 2023
May 4:
SCN23-50 Updated:
Changes to LAMP Station-Based and Gridded Guidance: Effective
June 6, 2023
May 4:
SCN23-49 Updated:
Changes to the GFS-based Model Output Statistics (MOS) Guidance: Effective
June 6, 2023
Apr 10:
SCN23-48:
Termination of the Standard Data Format (SDF) and Sensor Observation Service (SOS) at NDBC: Effective
June 24, 2023
Apr 4:
SCN23-35 Updated:
Upgrade of the Great Lakes Waves-Unstructured Forecast System (GLWU) to Version 2.0.0:
Effective May 9, 2023
Apr 3:
SCN23-47:
Addition of Air Quality Alerts for the Metropolitan St. Louis, MO Area on or about
May 3, 2023
Apr 21:
SCN23-46 Updated:
Probabilistic Tropical Cyclone Storm Surge (P-Surge) Model Upgrade:
Effective May 2, 2023
Mar 30:
SCN23-45:
Meteorological Assimilation Data Ingest System (MADIS) Version 4.0.8 Upgrade: Effective
March 29, 2023
Mar 26, 2024:
SCN23-44 Updated:
Implementation of Consolidated NWS Public Weather Program Products Related to Cold: Effective on or about
October 1, 2024
Mar 30:
SCN23-33 Updated:
Addition of Record Event Report for Hastings, NE on or about
April 3, 2023
Mar 28:
SCN23-14 Updated:
Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective
March 28, 2023
Mar 27:
SCN23-12 Updated:
New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective
April 3, 2023
Mar 24:
SCN23-43:
NWS API Version 1.11.1 Upgrade on or around
March 22, 2023
May 2:
SCN23-42 Updated:
Activation of GOES-East/West Ice and Snow Products on the Satellite Broadcast Network (SBN) on or after
June 5, 2023
Mar 21:
SCN23-41:
Termination of the River and Lake Forecast Product (RVD): Effective
April 21, 2023
Mar 17:
SCN23-40:
NWS Alaska Pacific River Forecast Center Discontinuing the Alaska Recreational River Forecast on
April 17, 2023
Mar 17:
SCN23-39:
NWS Alaska Pacific River Forecast Center Will Update Graphical Flood Products in Alaska on
April 17, 2023
Mar 17:
SCN23-38:
Updates to the Aeronautical Fixed Telecommunications Network (AFTN) on or around
April 17, 2023
Mar 17:
SCN23-37:
Implementation of Terminal Aerodrome Forecast (TAF) Service for Hardy-Anders Field/Natchez-Adams County Airport (KHEZ), Natchez, MS: Effective
June 13, 2023
Mar 15:
SCN23-36:
Eastern Pacific National Tropical Cyclone Watch/Warning (TCV) Product Issued by the National Hurricane Center to Include Both Inland and Coastal Tropical Cyclone Wind Watches and Warnings: Beginning on or around
June 15, 2023
Apr 4:
SCN23-35 Updated:
Upgrade of the Great Lakes Waves-Unstructured Forecast System (GLWU) to Version 2.0.0: Effective
May 9, 2023
Mar 10:
SCN22-77 Updated:
Change to NOAAPort / Satellite Broadcast Network (SBN): Effective
Early 2023
Mar 28:
SCN23-14 Updated:
Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective
March 28, 2023
May 18:
SCN23-31 Updated:
Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about
May 31, 2023
Mar 28:
SCN23-14 Updated:
Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective
March 28, 2023
Mar 1:
SCN23-07 Updated:
WSA-Enlil Heliospheric Model to Include Cessation of WSA Results Generated at 5Rs, Relocation of Time Series Acquisition Point from Earth to L1, and Improved WSA Results: Effective
April 4, 2023
Mar 1:
SCN23-34:
Change to the Transmission Deadline of the Weather Prediction Center QPF: Effective on
March 1, 2023
Mar 30:
SCN23-33 Updated:
Addition of Record Event Report for Hastings, NE on or about
April 3, 2023
Feb 28:
SCN23-32:
Removal of Watch Warning Advisory (WWA) Section at the Base of the NWS Weather Forecast Office (WFO) Anchorage, AK Area Forecast Discussion (AFD): Effective
March 30, 2023
Mar 27:
SCN23-12 Updated:
New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective
April 3, 2023
May 18:
SCN23-31 Updated:
Implementation of Mixed-Case Text/95 ASCII Character Set in Preliminary Local Storm Reports (LSRs) with Modified Event Types and Sources on or about
May 31, 2023
Feb 23:
SCN23-30:
Operational Implementation of Arrival of Tropical Storm-Force Winds Graphics for the South Pacific and Western North Pacific Based on Forecasts from the Joint Typhoon Warning Center (JTWC) on or around
May 15, 2023
Feb 23:
SCN23-29:
Operational Implementation of Wind Speed Probability Graphics for Tropical Cyclones in the South Pacific and Western North Pacific Basins based on Joint Typhoon Warning Center Forecasts on or around
May 15, 2023
Feb 23:
SCN23-28:
Extension of the Tropical Weather Outlook and Graphical Tropical Weather Outlook Issued by the National Hurricane Center and the Central Pacific Hurricane Center Out to 7 Days on or around
May 15, 2023
Feb 23:
SCN23-27:
Changes in County Forecasts and Warnings on NOAA Weather Radio All Hazards (NWR) Transmitters for Select Counties in South Carolina and Georgia: Effective
March 30, 2023
Feb 23:
SCN23-26:
Operational Implementation of Track and Error Cone Graphics for Tropical Cyclones in the South Pacific and Western North Pacific Basins Based on Forecasts Issued by the Joint Typhoon Warning Center: Effective on or about
May 15, 2023
Feb 23:
SCN23-25:
Expansion of the Potential Storm Surge Flooding Map to Puerto Rico and the U.S. Virgin Islands on or around
May 15, 2023
Feb 23:
SCN23-24:
Addition of Invest Identification Numbers to the Geographic Headers within the Tropical Weather Outlook Issued by the National Hurricane Center and the Central Pacific Hurricane Center on or around
May 15, 2023
Feb 23:
SCN23-23:
Removal of Watch/Warning Information from the Tropical Cyclone Forecast/Advisory (TCM) Product Issued by the National Hurricane Center and the Central Pacific Hurricane Center on or around
May 15, 2023
Feb 23:
SCN23-22:
Weather Forecast Offices San Diego and Los Angeles/Oxnard, CA To Begin Issuing the Tropical Cyclone Local Watch/Warning Product and Update the Hurricane Local Statement Product on or around
May 15, 2023
Feb 23:
SCN23-21:
Addition of the Extreme Wind Warning to the Suite of Tropical Products Issued by WFO Guam: Effective on or around
May 15, 2023
Feb 22:
SCN23-20:
Discontinuation of the Max/Min Temperature and Precipitation Table Product for Louisiana: Effective Thursday,
March 23, 2023
Feb 22:
SCN23-19:
Activation of Metop-C ASCAT Winds on the Satellite Broadcast Network on or about
March 24, 2023
Feb 22:
SCN23-18:
Operational Tropical Cyclone Discussion (TCD) and Tropical Cyclone Forecast/Advisory (TCM) Products for Tropical Cyclone Forecasts Originating from the Weather Prediction Center: Effective on or about
May 15, 2023
Feb 22:
SCN23-17:
Provision of Post-Tropical Cyclone Event Observational Data on Tropical Event Summary Webpages: Beginning on or about
May 15, 2023
Feb 22:
SCN23-16:
Operational Implementation of the Peak Storm Surge Forecast Graphic from the National Hurricane Center on or about
May 15, 2023
Feb 22:
SCN23-15:
Addition of Air Quality Alerts for the State of Nebraska: on or about
April 3, 2023
Mar 28:
SCN23-14 Updated:
Notification of Upgrade to the NCEP NOMADS Website to Version 2.2: Effective
March 28, 2023
Feb 21:
SCN23-13:
Notification of Removal of Logs from NWS’s TGFTP: Effective
March 7, 2023
Mar 27:
SCN23-12 Updated:
New Cloud-Based NOAA’s nowCOAST Map Viewer and Map Services: Effective
April 3, 2023
Feb 16:
SCN23-11:
A New Version of NWS National Map Viewer (“The Viewer”) will be Released on or about
April 3, 2023
Feb 15:
SCN22-119 Updated:
Changes to Public and Fire Weather Forecast Zones for WFO Los Angeles/Oxnard, CA: Effective
March 8, 2023
Feb 14:
SCN23-10:
Implementation of Terminal Aerodrome Forecast (TAF) Service for Upper Cumberland Regional Airport (KSRB), Sparta, TN: Effective
May 2, 2023
Oct 19:
SCN23-09 Updated:
NWS Will Cease Dissemination of WSR-88D Legacy Precipitation Processing System (PPS) Products on or about September 27, 2023
Mar 10:
SCN22-77 Updated:
Change to NOAAPort/Satellite Broadcast Network (SBN): Effective in
Early 2023
Apr 20:
SCN23-08 Updated:
Change to Significant Meteorological Information (SIGMET) Format at a
Date to be Determined
Jan 30:
SCN22-112 Updated:
Activation of GOES-R Geostationary Lightning Mapper Gridded Data Products on the Satellite Broadcast Network on or after
March 6, 2023
Mar 1:
SCN23-07 Updated:
WSA-Enlil Heliospheric Model to Include Cessation of WSA Results Generated at 5Rs, Relocation of Time Series Acquisition Point from Earth to L1 and Improved WSA Results: Effective
April 4, 2023
Jan 27:
SCN22-94 Updated:
Changes to the Geographic and Spectral Coverage of GOES-East/West Imagery on the Satellite Broadcast Network: Effective
December 1, 2022
(GOES-East) and
January 4, 2023
(GOES-West)
Mar 10:
SCN22-77 Updated:
Change to NOAAPort/Satellite Broadcast Network (SBN): Effective in
Early 2023
Jan 20:
SCN23-06:
Disestablishment of C-MAN Station PLSF1 - Pulaski Shoals Light, FL: Effective
February 28, 2023
Jan 20:
SCN23-05:
Disestablishment of C-MAN Station MLRF1 - Molasses Reef, FL: Effective
February 28, 2023
Jan 20:
SCN23-04:
Disestablishment of C-MAN Station DPIA1 - Dauphin Island, AL: Effective
February 28, 2023
Jan 10:
SCN23-03:
Adoption of New Upper Limit for Alert Duration of NOAA Weather Radio All Hazards Specific Area Message Encoding Alerts: Effective on or after
February 16, 2023
Jan 5:
SCN23-02:
Minor RTMA and URMA Upgrade to Flag Mesonet Winds and Wind Gust from the CWOP and AWS Providers, Fix a Reading Bug in the Observation Reject and Accept Lists, and Add Surface
Pressure to the “RTMA Weather Status List” for the FAA:
Effective on or about
February 7, 2023
Jan 5:
SCN23-01:
Shut Down Integrated Dissemination Program (IDP) GIS Web Services (IDP-GIS) Hosted and Running on IDP Infrastructure in College Park, MD and Boulder, CO:
Effective
June 29, 2023
For older PNSs, SCNs and TINs, see our archive:
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
NWS Service Change Notices
1325 East-West Hwy, 18th floor
Communications Office
Silver Spring, MD 20910
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