Explanatory remarks

(Section 2.3.2.8)

Lens- or almond-shaped Cirrocumulus elements may be produced by local orographic lifting of a layer of moist air. 

At middle and high latitudes, Cirrocumulus is usually observed with Cirrus and/or Cirrostratus. 

At low latitudes, Cirrocumulus is less often accompanied by Cirrus or Cirrostratus. 

A cloud is not identified as Cirrocumulus if it consists of a patch of incompletely developed small elements, such as often observed on the edges of a patch or sheet of Altocumulus or those sometimes present in separate patches at the same level as Altocumulus. 

In case of doubt, a cloud should be identified as Cirrocumulus only when it has evolved from, or is obviously connected with Cirrus or Cirrostratus.