What is the maximum distance from the aerodrome for which a TAF forecast is valid?

A Terminal Aerodrome Forecast (TAF) is specifically designed to provide weather forecasts for an aerodrome and its vicinity. The TAF is typically valid for a distance of 5 statute miles from the airport (aerodrome) for which it is issued. This 5 statute mile radius ensures that the forecast covers the area where the weather conditions are most critical for flight operations, providing pilots and airlines with crucial information during takeoff, landing, and while in the immediate vicinity of the airport.

Choosing a distance like 3, 10, or 15 statute miles would not align with the standard practice of TAF issuance, as those distances extend either too short or too far from the immediate area that impacts flight safety. Thus, a 5 statute mile forecast area provides both relevance and accuracy necessary for aviation operations near an airport.