altocumulus betydelse and definition

Exempel på altocumulus

• It is a fairly uncommon phenomenon, most often observed in altocumulus, cirrocumulus, lenticular clouds and cirrus clouds.

• The presence of altocumulus undulatus may indicate precipitation within the next 20 hours or simply an overcast day.

• Extensive altocumulus formations, particularly if they take the form of undulatus are often referred to as altocumulus mackerel sky.

• This often does not apply when stratocumulus is of a broken, fractus form, when it may appear as small as altocumulus.

• Altocumulus is also commonly found between the warm and cold fronts in a depression, although this is often hidden by lower clouds.

• Cirrocumulus is distinguished from altocumulus in several ways, although the two stratocumuliform genus types can occasionally occur together with no clear demarcation between them.

• Cirrocumulus generally occur at higher altitudes than altocumulus, and thus the cloudlets appear smaller as they are more distant from observation at ground level.

• An example of this would be an opaque layer of altocumulus stratiformis arranged in seemingly converging rows.