Stratocumulus

A stratocumulus cloud is a cloud belonging to a class characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumulus and the whole being at a lower altitude, usually below 2400 m (8000 ft).

External link

• National Science Digital Library - Stratocumulus (http://www.nsdl.arm.gov/Library/glossary.shtml#Stratocumulus)