This handbook consolidates the weather information from the following advisory circulars (AC) into one source document. By doing this, the Federal Aviation Administration (FAA) intends to streamline access to the FAA’s weather documentation for users of the National Airspace System (NAS). The following ACs will remain in effect, but they will eventually be cancelled at a later date following the publication of this handbook: •AC 00-6, Aviation Weather. •AC 00-24, Thunderstorms. •AC 00-30, Clear Air Turbulence Avoidance. •AC 00-45, Aviation Weather Services. •AC 00-54, Pilot Windshear Guide. •AC 00-57, Hazardous Mountain Winds. This handbook is designed as a technical reference for all who operate in the NAS. Pilots, dispatchers, and operators will find this handbook a valuable resource for flight planning and decision making. This handbook conforms to pilot weather training and certification concepts established by the FAA. The discussion and explanations reflect the most commonly used weather products and information.
