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NWSWeather

NWS Public Alerts (CAP)

Common Alerting Protocol (CAP) feed of all active NWS alerts including aviation hazards.

Agency

NWS

Update cadence

Streamed, polled every 5 minutes

Category

Weather

What we ingest

Alert geometries, severity, urgency and certainty fields, plus the SAME and NWS event codes, the issuing sender and office name, scope, language, and the upstream alert link.

Where this feed reaches

A region on this list means we fetch it. It is not a promise of station density: a listed region can still have sparse or no reporting sites near a given airport. Where a feed does not reach a region at all, this page says so instead of showing an empty panel.

  • Continental United States
  • Alaska
  • Hawaii
  • Puerto Rico and the US Virgin Islands
  • Guam and the Northern Mariana Islands
  • American Samoa

How AeroCopilot uses it

High-severity alert banners and AI weather context.

Powers these features

The product surfaces below depend on this feed.

AI Copilot weather

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

Cite this

Permalink

AeroCopilot — NWS Public Alerts (CAP). Data: NWS (https://api.weather.gov/alerts/active). https://www.aerocopilot.ai/data-sources/nws-alerts.

Try the AI Copilot with this data

The Copilot has live access to NWS Public Alerts (CAP) during every conversation.