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:
- Moderate turbulence
- Low−level windshear
- Strong surface winds greater than 30 knots
- Moderate icing
- Freezing level
- Mountain obscuration
- IFR (Widespread areas of ceilings less than 1,000 ft or visibility less than 3 miles.)