What does an overcast (OVC) sky indicate?

An overcast (OVC) sky indicates that the entire sky, or 8/8 of it, is covered by clouds. This term is used in aviation and meteorology to describe conditions where the cloud cover is complete, meaning that there is no visible portion of the sky without clouds. Such a condition has significant implications for visibility, flight operations, and weather predictions. The presence of an overcast layer can impact sunlight reaching the ground and is often associated with different weather phenomena, including precipitation. Understanding this is crucial for pilots and meteorologists when assessing flight conditions and weather forecasting.