Opacus
(Section 2.2.2.3.9)An extensive cloud patch, sheet or layer, the greater part of which is sufficiently opaque to mask completely the Sun or Moon.
This term applies to Altocumulus, Altostratus, Stratocumulus and Stratus.
An extensive cloud patch, sheet or layer, the greater part of which is sufficiently opaque to mask completely the Sun or Moon.
This term applies to Altocumulus, Altostratus, Stratocumulus and Stratus.