G-AIRMETs

Provides access to decoded G-AIRMETs (Graphical AIRMETs) for the contiguous United States — graphical weather advisories issued by the Aviation Weather Center. G-AIRMETs are organized by product type: SIERRA (IFR/mountain obscuration), TANGO (turbulence/wind shear/surface winds), and ZULU (icing/freezing level). They can also be queried by specific hazard type (e.g., ICE, TURB_LO, IFR). Each advisory includes the hazard, severity, altitude range, and geographic polygon of the affected area. G-AIRMETs are issued every 3 hours with forecasts at 0, 3, 6, 9, and 12 hour intervals.

Depict moderate-level hazards like turbulence, IFR conditions, icing, and mountain obscuration. Issued at 3-hour intervals extending 12 hours ahead for the contiguous US.

G-AIRMET data guide on aviationweather.gov

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