What are AIRMETs used to inform pilots about?

AIRMETs, which stands for Airmen's Meteorological Advisory, are specifically designed to provide pilots with information about short-term weather phenomena that may not be included in standard weather reports or forecasts, such as the Graphical Area Forecasts (GFAs). These advisories encompass phenomena that could significantly impact flight safety, including but not limited to, moderate turbulence, icing conditions, and areas of reduced visibility.

Unlike long-term weather forecasts that cover broader trends over extended periods, AIRMETs focus on immediate weather conditions that are relevant to pilots while in flight. They do not cover severe turbulence forecasts, as these are typically addressed by SIGMETs, which are distinct from AIRMETs in terms of severity and criteria. Similarly, flight safety regulations are not what AIRMETs provide; they instead inform pilots about current weather conditions and phenomena that could affect flight operations directly and promptly. Therefore, the overarching purpose of AIRMETs is to alert pilots to transient weather conditions that may require their attention while conducting flights.