Which radius does the Terminal Aerodrome Forecast typically cover around the airport?

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Multiple Choice

Which radius does the Terminal Aerodrome Forecast typically cover around the airport?

Explanation:
TAF provides the weather forecast for the terminal area around an airport, not just the exact aerodrome itself. This forecast needs to reflect conditions in the surrounding airspace that arrivals and departures will traverse, so it covers a fairly broad radius—about twenty statute miles from the airport center. That size ensures you have visibility, ceilings, wind, and storm timing information relevant to every approach and departure corridor within the terminal area. Smaller radii would miss weather that can influence operations as aircraft move in and out of the vicinity, while a larger radius isn’t the standard for a TAF. So, twenty statute miles is the typical coverage.

TAF provides the weather forecast for the terminal area around an airport, not just the exact aerodrome itself. This forecast needs to reflect conditions in the surrounding airspace that arrivals and departures will traverse, so it covers a fairly broad radius—about twenty statute miles from the airport center. That size ensures you have visibility, ceilings, wind, and storm timing information relevant to every approach and departure corridor within the terminal area. Smaller radii would miss weather that can influence operations as aircraft move in and out of the vicinity, while a larger radius isn’t the standard for a TAF. So, twenty statute miles is the typical coverage.

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