A Terminal Aerodrome Forecast (TAF) is a concise statement of the expected meteorological conditions within a radius of how many statute miles of the center of an airport's runway complex?

• A. 3
• B. 5
• C. 10
• D. 25

Answer: (B)

Forecasts for aviation focus on the weather that will affect operations at the airport. A TAF provides a concise forecast of conditions within a defined radius around the center of the airport’s runway complex, and that radius is five statute miles. This keeps the forecast tightly tied to the airfield environment where takeoffs, landings, and approaches occur, covering winds, visibility, cloud ceiling, and significant weather that could impact those operations. Five miles is about eight kilometers, a practical scope that reflects the area most likely to influence the runway area without extending far into the surrounding region. Other radii would either miss near-field conditions important to the airport’s operations or extend beyond the purpose of the TAF, which is specifically to describe the airport vicinity.