What does the prefix "strato-" refer to in cloud classification?

The prefix "strato-" is derived from the Latin word "stratus," which means "spread out" or "layered." In cloud classification, this prefix specifically indicates clouds that form in horizontal layers, often resulting in a blanket-like appearance across the sky. These layered clouds can cover large areas and are typically associated with stable atmospheric conditions.

Stratus clouds, for instance, are the classic example of clouds with the "strato-" prefix. They often appear gray and can lead to overcast skies, sometimes producing light precipitation. Understanding this classification helps in predicting weather patterns and visibility conditions, as layered clouds can signify humidity and the potential for overcast weather.