What is the meaning of the METAR term 'FC'?

The term 'FC' in METAR refers to "Funnel Cloud." This indicates a weather phenomenon associated with severe thunderstorms, characterized by a rotating column of air that extends from the base of a cumulonimbus cloud toward the ground but does not reach the surface. It’s important for pilots and meteorologists as it signals potential tornado activity and the possibility of severe weather.

Understanding the distinctions in meteorological abbreviations is crucial for accurate weather interpretation. While terms like "Freezing Fog," "Thunderstorm," and "Light Freezing Rain" are significant in their own context, they correspond to different conditions and are represented by other abbreviations in METAR reporting. Therefore, recognizing 'FC' specifically as a funnel cloud helps in assessing flight safety and preparing for adverse weather conditions.