Which cloud cover term indicates a layer with no significant clouds in METARs?

The term "Clear" in METARs signifies a layer of the atmosphere with no significant clouds present. In aviation weather reporting, clarity regarding cloud cover is crucial for flight safety and planning, and "Clear" conveys that the sky is free from clouds that could obstruct visibility or have an impact on flight operations.

On the other hand, terms like "Few," "Scattered," and "Overcast" all indicate varying levels of cloud presence. "Few" suggests that there are a small number of clouds observed, while "Scattered" indicates that clouds are present but not densely packed. "Overcast" means that the sky is completely covered with clouds. Understanding these distinctions helps pilots and meteorologists accurately assess weather conditions and make informed decisions regarding flight safety.