weather.gov
US National Weather Service forecast and alert data provider.
Exposes the US National Weather Service public API. Callers resolve a coordinate to a forecast grid and read period forecasts, plus active severe weather alerts filtered by state or zone.
Return the multi-day period forecast for a US coordinate, resolving the forecast office and grid internally.
Return active severe weather alerts, filtered by US state code or NWS zone, with severity and effective windows.
Two-letter US state code
Suggested surface — propose changes in your submission if the upstream differs.
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Latitude in decimal degrees within US coverage
38.8894
Longitude in decimal degrees within US coverage
-77.0352
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CA
Severity filter: minor, moderate, severe, or extreme
severe
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