What does SPECI represent in a TAF?

SPECI in a TAF (Terminal Aerodrome Forecast) stands for a special weather report that provides updates on significant changes in weather conditions at an airport. It is important for aviation safety because it communicates crucial information about sudden variations in conditions that might affect flight operations.

When conditions improve or deteriorate—such as changes in visibility, wind, or precipitation—these updates are vital for pilots and air traffic controllers to make informed decisions about take-offs, landings, and overall flight planning. Therefore, the correct choice reflects the purpose of SPECI in highlighting notable fluctuations in weather, which may signify a noticeable improvement or worsening of conditions affecting aviation.