Why are local geographical factors significant in TAFs?

Local geographical factors are significant in Terminal Aerodrome Forecasts (TAFs) primarily because they can influence weather conditions at the airport. These factors include terrain features such as mountains, bodies of water, and urban environments, which can alter wind patterns, precipitation, temperature, and cloud formations. For instance, a nearby mountain range might block or redirect prevailing winds, leading to local turbulence or changes in visibility. Similarly, water bodies can affect humidity and localized weather phenomena such as fog or storms.

Incorporating these geographical elements into TAFs enhances the accuracy of predictions, ensuring that pilots and air traffic controllers have a better understanding of the specific weather conditions they might encounter at the airport. This understanding is crucial for safe flight operations, particularly for takeoff and landing phases, where localized weather events can have significant impacts.