What is the standard radius used for a TAF?

What is the standard radius used for a TAF?

• A. 3 NM
• B. 7 NM
• C. 10 NM
• D. 5 NM

Answer: (D)

In aviation weather, a Terminal Aerodrome Forecast covers the weather around the airport where takeoffs and landings happen. The standard radius for a TAF is five nautical miles. This size focuses the forecast on the terminal area—where winds, visibility, and precipitation directly affect approach, landing, and departure—without diluting the forecast with weather farther away that won’t usually impact the aerodrome operations. A smaller radius could miss conditions near the runways and final approach; a larger radius would include weather that’s less likely to influence the airport’s operations. Thus, five nautical miles is the practical, standardized choice.

In aviation weather, a Terminal Aerodrome Forecast covers the weather around the airport where takeoffs and landings happen. The standard radius for a TAF is five nautical miles. This size focuses the forecast on the terminal area—where winds, visibility, and precipitation directly affect approach, landing, and departure—without diluting the forecast with weather farther away that won’t usually impact the aerodrome operations. A smaller radius could miss conditions near the runways and final approach; a larger radius would include weather that’s less likely to influence the airport’s operations. Thus, five nautical miles is the practical, standardized choice.