What does "OVC005" in an ASOS report indicate?

The notation "OVC005" in an ASOS report stands for overcast clouds at a height of 500 feet above ground level. In meteorological terminology, "OVC" signifies that the sky is covered with clouds, providing a uniform ceiling without breaks, which is essential for pilots and others assessing flight conditions. The number "005" indicates the cloud base is at 500 feet.

This is crucial information for flight operations, as it informs pilots of potential low visibility conditions and the presence of cloud cover at low altitudes. Recognizing the implications of such a report helps in making informed decisions regarding weather-related flight risks and operational safety.