What is the term for sky cover that is completely obscured?

The term for sky cover that is completely obscured is "OVC," which stands for "overcast." In meteorological reports, OVC signifies that the entire sky is covered by clouds, leaving no part of the sky visible. This term is used when there is 100% cloud cover. Understanding this concept is crucial for interpreting weather conditions, especially for aviation and other activities that are affected by visibility.

The other terms refer to different levels of cloud cover: "BKN" indicates broken clouds, which means there are sufficient gaps in the clouds to allow some visibility of the sky; "SCT" refers to scattered clouds, where clouds cover between 1/8 and 4/8 of the sky; and "CLR" describes clear skies with no significant cloud coverage. Each of these terms offers a specific detail about the atmospheric conditions, but only OVC denotes complete obscurity.