A graphical depiction of weather that may be hazardous to aircraft, but are less severe than SIGMETs. G-AIRMETs are issued 3 hours apart for a period of up to 12 hours into the future for the lower 48 states and coastal waters. The weather hazards depicted can be: 1. Moderate turbulence 2. Low-level windshear 3. Strong surface winds greater than 30 knots 4. Moderate icing 5. Freezing level 6. Mountain obscuration 7. IFR

Source FAA Pilot/Controller Glossary↗ · checked 2026-08-25