NWSWeather

SIGMET (Significant Meteorological Information)

Hazards advisory covering severe icing, severe turbulence, dust storms, sandstorms, volcanic ash and convective activity.

Agency

NWS

Update cadence

Issued as needed, polled every 15 minutes

What we ingest

Geometry polygons + altitude bands + validity windows.

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

How AeroCopilot uses it

Renders SIGMET overlays on the planning map and feeds the hazard avoidance tool.

Powers these features

The product surfaces below depend on this feed.

Map hazards layerAI hazard summary

Upstream source: https://aviationweather.gov/data/api/

Cite this

Permalink

AeroCopilot — SIGMET (Significant Meteorological Information). Data: NWS (https://aviationweather.gov/data/api/). https://www.aerocopilot.ai/data-sources/sigmet.

Try the AI Copilot with this data

The Copilot has live access to SIGMET (Significant Meteorological Information) during every conversation.