Description

Stratiform, or layer clouds, are cloud formations that are not vertically developed. They are formed in relatively stable conditions, where lifted air will be restricted, and instead be spread out horizontally. The cloud base may be quite low, if not actually touching the ground (fog). Cloud top is determined by the lifting/mixing of the air and its water vapour content. The shape or structure of the cloud top, with the exception of significant features is due to atmospheric conditions (warming, cooling, wind, etc) at the top and not an indication of wind at the surface.