What is the definition of OVC?

OVC stands for "overcast," which describes a sky condition where the entire sky is covered with clouds. This terminology is used in meteorology to communicate significant cloud cover, specifically when the cloud cover is composed of at least 8/8 of the sky, meaning that there are clouds filling the entire sky with no breaks or clear areas visible.

The distinction of OVC reflects a complete cloud cover and indicates that sunlight will be significantly obscured. Understanding this terminology is crucial for pilots and meteorologists as it helps convey important visibility and weather conditions in flight planning and operations.