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Data sources

Forecasts

National Weather Service (api.weather.gov); Open-Meteo where NWS is unavailable

Current observations

NOAA/NWS station observations and NOAA aviation reports (METAR) from the nearest qualifying station

Particle AQI

PurpleAir sensors, EPA-corrected

Severe outlooks & graphics

NOAA Storm Prediction Center, Weather Prediction Center and NWS

Cameras

Webcams provided by windy.com and official local camera partners

Weather data credit

Weather data by Open-Meteo.com (CC BY 4.0)

Official alerts show their National Weather Service source on each alert.