Know what the sky is doing.
Live alerts, radar, satellite, SPC outlooks, soundings, and HRRR forecasts — in one place, from every source that matters.
Every source you'd check anyway. In one place. Live.
Every source that matters
NWS alerts, SPC outlooks and watches, NEXRAD radar, GOES-16 satellite, upper-air soundings, HRRR forecasts, and USGS river gauges — ingested, normalized, and mapped together.
Know your place
Search any city, ZIP, or address. See every active alert, outlook, storm report, and current observation at that exact point. Share a link anyone can open to see the same view.
Not just a pretty map
Animated radar loops, Skew-T soundings with derived parameters, HRRR point forecasts, interactive SPC outlook categories, and a developer API — all free.
One API for severe weather.
Normalized GeoJSON. Consistent spatial queries. GeoJSON output by default. Rate-limited but generous.
Query active alerts, SPC outlooks, watches, mesoscale discussions, storm reports, surface observations, upper-air soundings, radar tiles, satellite imagery, river gauges, or HRRR point forecasts from a single consistent API.
$ curl "https://atmostorm.com/api/v1/alerts \
?state=OK&active=true&severity=Extreme"
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": { "type": "MultiPolygon", ... },
"properties": {
"event": "Tornado Warning",
"severity": "Extreme",
"urgency": "Immediate",
"headline": "...",
"expires": "2026-04-18T22:15:00Z"
}
}
]
}Trusted public data. Credited and cited.
Atmostorm doesn't own the weather. It organizes it. Every data source is attributed in-app and linked in our docs.
Get the full picture.
Free to use. Open to developers. Supported by donations from the people who use it.