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Multiple Days of Severe Weather from Thunderstorms and Wildfires
Active spring pattern across the center of the nation with several rounds of severe thunderstorms in the forecast through the weekend. The regions under the greatest threats are the southern Plains into the Mississippi Valley. Meanwhile, dry and breezy conditions with dry fuels are aiding in wildfires across the western High Plains and the Southeast. Wind and some snow for northern Rockies.
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The data displayed on this page is considered preliminary and is subject to quality control review and adjustment.
We are aware that the download data feature is not available. At this time, there is no estimate on when this will return.
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About This Page
Unit of
Measurement
Number of Hours
to Retrieve
Page Headers
See Chart
Permanent
Chart
Gather Historical
Data
Observation
Type
Show Only
Hourly Data
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Precip.
View
Standard (w/mph)
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Standard (w/kts)
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(NWS/FAA Only)
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General Information
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Cloud Information
Precipitation
Snow
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By default, this page will load with all station data collected in the last 72 hours, with the station identifier as the "site" variable in the URL
Example:
If the station reports Temperature, Relative Humidity, or Dew Point Temperature, a chart will be available with those elements to examine.
Below the chart, a table will appear with 72 hours worth of data from that station. Hovering over certain headings will reveal a "magnifying glass" cursor. That means that if you click on that heading, data for that element will load into the chart.
Note
: Data availability varies by station.
Pages With and Without Chart
The default station chart contains Temperature, Dew Point Temperature, and Relative Humidity. If a station has not reported any of those elements during the requested period, no chart will be available.
A chart other than the default may be selected by clicking the "Advanced Options" button and selecting an option from the "Permanent Chart" drop down menu.
The chart has a limitation where 1000 data points per element can be displayed. For longer duration datasets, with multiple reports per hour, this will exceed the charting capability. Therefore, data will be trimmed when it exceeds 1000 datapoints, and will then display every 2nd, 3rd, etc point. If you require high resolution charts, the "Historical Data" option will be helpful.
Example 1: A NWS ASOS reports 12 - 13 times an hour. After 76 hours, data will be trimmed in the chart.
Example 2: A station that reports 4 times an hour will begin trimming data after 250 hours.
To view charts for additional elements, using a mouse, move the cursor over the element headings. If a "magnifying glass" cursor appears, it means that if you click on that heading, data for that element will load into the chart. See image below.
The following weather elements are available for viewing in a chart.
Note
: Data availability varies by station.
Temperature
Dew Point Temperature
Relative Humidity
Wind Chill
Wind Direction
Wind Speed and Gusts
Fuel Temperature
Fuel Moisture
Sea Level Pressure
Altimeter Setting
Station Pressure
Solar Radiation
Soil Temperature
Road Temperature
Road Sub-Surface Temperature
Accumulated Precipitation
One Minute Precipitation
Five Minute Precipitation
Ten Minute Precipitation
Fifteen Minute Precipitation
Thirty Minute Precipitation
One Hour Precipitation
Snow Depth
Snow Interval
Snow-Water Equivalent
Water Temperature
Mouse over Chart Headings to reveal Magnifying Glass, Then Click for Chart
Clicking the "Settings" icon will open an area where you can select different viewing parameters.
Units of measurement
: toggle between "standard (with speeds in mph)", "standard (with speeds in knots)" and "metric" measurements.
Number of hours
: Up to 720 hours (30 days) of data can be displayed on this page.
Page Headers
: Select how much of the "top" of the page you'd like to see.
See Chart
: Toggle "on" or "off" the data chart
Permanent Chart
: Select a chart to be continually displayed and that will refresh when the page does
Gather Historical Data
: When "On" is checked, you will be able to select the starting and ending dates you are interested in getting data for (limit of 30 days)
Observation Type
: The page will display coded Meteorological Aerodrome Reports (METAR), and Special Reports (SPECI). See how to decode METARs
here
Hourly Data
: By default, the page will display all data for a given time period. If "Yes" is checked, the page will only display data where the observation time stamp has between "51" and "59" in the minutes field for NWS/FAA observation platforms (to include any "SPECI" observations/data - with the date&time stamp highlighted in yellow), and between "56" and "04" for all other platforms.
If the station is a federally owned ASOS/AWOS, METAR and SPECI data will be included.
SPECI
data will have a bold timestamp and be highlighted in yellow. See image below.
Font Size
: The default size is 12. You can select values from the drop down or edit the url
&font=12
with any whole number.
Precip View
: This will select how the calculated precipitation values fill in 1, 3, 6, and 24 hour fields in a row of data.
"Full" will populate out each row with 1, 3, 6, and 24 hour data.
Note
: This takes longer to load.
"Standard" will populate lines rows are aligned with times corresponding to 1, 3, 6, and 24 hour data
"Measured" will
NOT
populate 1, 3, 6, and 24 hour data. This will simply display the value reported by the sensor.
Apply Settings
: When you click this button, the page will refresh with the options you selected. The URL in the web browser address bar has those options "built in", so the format can be saved/bookmarked.
Hourly ASOS data with "Special" Observations
Certain elements (wind, visibility and clouds) are color coded based on long standing core partner requests, others are colored for convenience:
Element
Color
Criteria
6/24 Hour High temperatures
Red
6/24 Hour Low temperatures
Blue
Precipitation
Green
Wind Speed
Black
< 20 mph
Blue
< 40 mph
Red
< 58 mph
Magenta
>= 58 mph
Wind Gusts
Black
< 11 mph
Blue
< 12 mph
Red
< 13 mph
Magenta
>= 13 mph
Visibility
Black
>= 7 miles
Orange
< 7 miles
Red
<= 3 miles
Magenta
<= 1 mile
Clouds
Black
> 8000 ft
Orange
<= 8000 ft
Red
<= 3000 ft
Magenta
<= 1000ft
How Clouds are Measured
Cloud height sensors can measure clouds up to 12,000 feet above the ground, when the cloud is directly above the sensor.
This limitation can result in "Clear" conditions being reported, when clouds are above 12,000 feet.
At major airports, this information can be augmented by a trained observer, who can also determine heights greater than 12,000 feet.
Decoding Cloud Information:
Up to 3 layers (the lowest 3 layers) of clouds can be reported.
The first 3 letters of a cloud group describe the amount of sky coverage. The last 3 numbers indicate the base of that layer, above the ground x 100 feet.
SKC
: Sky Clear.
CLR
: No clouds below 12,000 feet above ground level, as detected by automatic equipment.
FEW
: Few Clouds - Between 1/8 and 2/8 of the sky is covered by clouds.
SCT
: Scattered Clouds - Between 3/8 and 4/8 of the sky is covered by clouds.
BKN
: Broken Clouds - Between 5/8 and 7/8 of the sky is covered by clouds.
OVC
: Overcast - 8/8 of the sky is covered by clouds.
VV
: Vertical Visibility - An indefinite cloud ceiling caused by fog, rain, snow, etc.
Decoding Cloud Data
Precipitation (precip) can be measured 2 different ways: Using a weighing mechanism, or by using a tipper.
When a weighing mechanism is used, precipitation (rain, or snow) will be stored in a bucket, and an electronic scale is used to convert the weight to a value.
Accumulated Precipitation
is reported.
When a tipper is used, liquid precipitation (rain or melted snow) gathers in a small measuring cup that looks like a see-saw. Each time it fills up, the see-saw tips, and that action is recorded as 0.01 inches of precipitation. The number of tips over the recording period results in the value displayed.
Precipitation is reported in 5, 10, 15, 30, or 1 hour increments. Values for 3, 6, or 24 hour precipitation are extrapolated from those reports, and are displayed hourly, or every 3, 6, or 12 hours (for 24 hour precip).
If a station reports precipitation, the "top line" of data will always include precip over the last 1, 3, 6, and 24 hours, relative to that time.
Explanation of 1, 3, 6 and 24 hour Totals
Snow depth is generally measured by probes mounted above a surface. They measure the distance between the probe and a surface. As snow accumulates or melts/blows away, that measurement will change.
Snowfall
" calculations are made by taking the snow depth measurement at a given time, and subtracting the snow depth from 3, 6, or 24 hours previous to time the current snow depth value was recorded. Negative values are not recorded.
*** Due to wind, snowmelt and compression, this is not always an accurate measurement.
If a station reports snow depth, the "top line" of data will always include snowfall over the last 1, 3, 6, and 24 hours, relative to that time.
Explanation of 3, 6 and 24 Hour Snowfall
Data can be downloaded by clicking the 3 lines in the upper right corner of the chart, and clicking "Download CSV or Download XLS"
Example of Downloading Data
If you notice data inconsistencies, or errors with this page, do not report those to us. Data is provided to this page through many different entities, and the maintainers of this page are not in contact with those entities. Your best course of action with regard to data accuracy may be to contact the local NWS office where this station lies. In some cases, they
MAY
be able to contact the responsible party. Refer to the image below. The NWS office under which the station is installed is available by clicking the 3 letter identifier, and finding their contact information.
Aside from issues referenced above, please provide feedback, or report issues with this page by sending email to wr.web.support@noaa.gov
If you're reporting an issue, it's helpful if you:
Include the URL you're noticing the issue with
Include the link from the page that "got you to" the URL above
Include a screen shot for display/graphical issues, if you can
Current Known Issues:
Hourly charts sometimes display "non-hourly" data
Things We Are Exploring:
Issuing a cookie to preserve settings
Selecting certain chart elements NOT be displayed on page refresh
Freezing the table header at the top of the page when scrolling
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