Tropical Storm Man-Yi in the Western Pacific is forecast to pass near or over Guam Wednesday CHST as a tropical storm. Tropical Storm Warnings have been issued for Guam, Rota, Tinian and Saipan. Red Flag Warnings have been issued today for southern New England due to critical fire weather from gusty winds and dry fuels. Read More >
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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: https://www.weather.gov/wrh/timeseries?site=kslc
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.
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.
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.
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.
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Clicking the "Settings" icon will open an area where you can select different viewing parameters.
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.
Precipitation (precip) can be measured 2 different ways: Using a weighing mechanism, or by using a tipper.
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.
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.
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.
Data can be downloaded by clicking the 3 lines in hte upper right corner of the chart, and clicking "Download CSV or Download XLS"
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
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