Sc compared with As

(Section 2.3.7.6.3)

An extensive layer of Stratocumulus is distinguished from Altostratus by:

• Having a less uniform base
• Presence of elements, rounded masses, rolls, etc.
• Appearing non-fibrous, except at extremely low temperatures (Altostratus often has a fibrous appearance)
• Very weak and infrequent precipitation in the form of rain, snow or snow pellets (Altostratus can have light, or occasionally moderate, falls of rain, snow or ice pellets)