Which hazard is NOT included in a G-AIRMET product?

In the context of G-AIRMET products, the focus is on identifying specific weather hazards that could impact flight safety, particularly for general aviation aircraft. G-AIRMETs are specialized bulletins that primarily highlight certain hazardous conditions.

Thunderstorms, while significant in terms of their hazards, are not part of what G-AIRMET products routinely cover. Instead, G-AIRMET focuses on conditions such as severe icing, low visibilities, and mountain obscuration, which are critical for flight planning and safety.

Severe icing is a major concern for pilots, particularly in colder air masses, where aircraft may encounter ice accumulation that can lead to loss of control. Low visibilities can affect a pilot's ability to navigate and see obstacles, while mountain obscuration is particularly relevant for flights operating near mountainous terrain where topographical features may become hidden from view.

In conclusion, thunderstorms do not fall under the purview of G-AIRMET products, as they are typically addressed through other means (such as SIGMETs), focusing instead on the persistent and widespread hazards that impact general aviation operations.