How often are AIRMETs issued?

AIRMETs, or Airmen's Meteorological Advisories, are issued every 6 hours to provide essential information about weather conditions that may affect the safety of flight operations. These advisories are intended for pilots and contain updates on potentially hazardous weather phenomena, such as turbulence, icing, and low visibility, that are not severe enough to warrant a SIGMET.

The frequency of issuance ensures that pilots and flight crews receive timely and relevant information to make informed decisions during flight planning and operations. By being issued every 6 hours, AIRMETs can effectively reflect changes in weather patterns that may develop or dissipate within that time frame. This timing strikes a balance between providing frequent updates and allowing sufficient time for data collection and analysis.