Definition
A graphical forecast product issued by the Aviation Weather Center that depicts the location, extent, and timing of weather hazards significant to aircraft operating below 18,000 feet. It covers hazards such as turbulence, icing, low-level wind shear, IFR conditions, mountain obscuration, and surface winds of 30 knots or greater. Forecasts are issued every six hours and provide snapshots at three-hour intervals out to twelve hours.
Plain English
A set of weather maps that shows where hazards like icing, turbulence, and low ceilings are expected, and when they will occur, for flights below 18,000 feet.
Context Anchor
Seen during preflight weather planning, especially when checking aviation weather maps before choosing a route or deciding whether conditions are acceptable.
Derivation
Graphical means shown as a picture or map rather than as text. The earlier AIRMET product was a written bulletin; the graphical version replaced walls of text with maps that show exactly where the hazards are and when they apply.
Why Pilots Care
Allows quick visual identification of weather hazards so pilots can adjust routes or altitudes before departure.
Grounding Statement
Instead of describing a weather hazard only in words, this product draws the expected hazard area on a map so the pilot can compare it with the planned flight path.
Intuition Check
Do not assume this means any weather picture for pilots. In this context, it means a specific aviation weather advisory product showing forecast hazard areas on a map.
Example Sentence 1
During preflight planning, she checked the G-AIRMET and saw moderate icing forecast along her route between 6,000 and 12,000 feet.
Example Sentence 2
Before filing the flight plan, she reviewed the latest graphical airmen's meteorological information to confirm no icing was forecast at her cruising altitude.