
.topic 30
denotes the conditions which generally exist during precipitation and a short time before and after


.topic 40
Clouds in the form of irregular shreds, which have a clearly ragged appearance

.topic 50
Generally grey cloud layer with a fairly uniform base, which may give drizzle, ice prisms or snow grains. When the sun is visible through the cloud, its outline is clearly discernible. Stratus does not produce halo phenomena except, possibly, at very low temperatures. Sometimes Stratus appears in the form of ragged patches.


