Stratocumulus opacus (Sc op) - CEN 1930

Dense Stratocumulus composed of a continuous or nearly continuous sheet or layer of large dark rolls or rounded masses, most of which are sufficiently opaque to hide the Sun or Moon. The base of Stratocumulus opacus is sometimes even, and its apparent subdivision into merged elements results from the irregularity of its upper surface. More often, however, the under surface is uneven, and the elements stand out in true relief.