What is indicated by the "VC" in a TAF?

The indication of "VC" in a TAF refers to conditions observed in the vicinity of the aerodrome. This term is used to signify that specific weather phenomena, such as rain, fog, or thunderstorms, are not directly at the airport but are occurring nearby. This is important for pilots and flight operations as it highlights potential hazards that could affect aircraft during landing, takeoff, or in-flight procedures.

Understanding this term helps in assessing the weather's impact on flight operations, as conditions in the vicinity can lead to changes in visibility, turbulence, or other conditions that may affect safety, even if the airport itself is reporting different (often clearer) weather. The use of "VC" emphasizes the need for pilots to remain alert to nearby weather developments that could influence their flights.