NWS Weather Alerts

NOAA/NWS

About this Data Source

The National Weather Service (NWS) API provides real-time severe weather alerts for the United States and its territories. It publishes watches, warnings, and advisories for hazards including tornadoes, hurricanes, floods, and winter storms. The API follows the Common Alerting Protocol (CAP) standard and is part of the U.S. government open data initiative.

Operator

NOAA / National Weather Service (U.S. Dept. of Commerce)

License

Open

Registration

None

Cost

Free — U.S. government public data

Feed Details

Endpoint

https://api.weather.gov/alerts/active

API Type

REST/GeoJSON

Provider

NOAA/NWS

Coverage

Refresh Rate

5 min

Documentation

https://www.weather.gov/documentation/services-web-api

How this feed contributes to OVIX

Severity × urgency × certainty multiplier

weather

2.8/10

Live Health

Status

🟢 LIVE

Events (24h)

434

Events (1h)

179

Last Ingested

<1 min ago

Avg Severity

2.8

Max Severity

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