Domestic SIGMETs
Provides access to domestic SIGMET advisories for the contiguous United States. Does not include SIGMETs issued by the US in international format. SIGMETs warn of severe weather hazards significant to all aircraft (severe turbulence/icing, convective activity). Each advisory includes the hazard type, severity, altitude range, and geographic polygon defining the affected area.
Warn of hazardous weather including severe icing, turbulence, dust storms, and volcanic ash. Valid for up to 4 hours; used by pilots and ATC for en route planning.
SIGMET data guide on aviationweather.gov/api/v1/sigmetsPrivate PilotGet All Sigmets
Gets all current domestic SIGMET advisories across all hazard types.
/api/v1/sigmets/hazard/{hazardType}Private PilotGet Sigmets By Hazard Type
Gets SIGMETs filtered by hazard type.
/api/v1/sigmets/affectingPrivate PilotSearch Affecting
Finds SIGMETs whose geographic boundary contains the given point. Returns advisories that affect a specific location, answering "what SIGMETs are active at this position?"
/api/v1/sigmets/by-areaPrivate PilotSearch By Area
Finds SIGMETs that intersect a geographic bounding box. Returns advisories whose boundary overlaps the specified area, useful for checking conditions across a flight route.