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Altocumulus castellanus cloud

Type of altocumulus cloud

Summary

Type of altocumulus cloud

Field	Value
name	Altocumulus castellanus
image location	Hiranandani-Gardens-3.jpg
image name	Altocumulus castellanus clouds, with higher altocumulus floccus
abbreviation	Ac cas
symbol	Clouds CM 8.svg
genus	Altocumulus (high, heaped)
species	castellanus (castle)
variety	* Duplicatus
altitude_m	2,000 - 6,000
altitude_ft	6,500 - 20,000
level	medium
appearance	Middle-altitude Stratocumulus clouds arranged in groups with rising towers, turrets.
precipitation	Virga only.

Lacunosus
Opacus
Perlucidus
Radiatus
Translucidus
Undulatus

In meteorology, Altocumulus castellanus or Altocumulus castellatus (ACCAS) is a cloud type named for its tower-like projections that billow upwards from the base of the cloud. The base of the cloud can form as low as 2,000 metres (6,500 feet), or as high as 6,000 metres (20,000 feet). They are very similar to cumulus congestus clouds, but at a higher level and with the cloud heaps joined at the base.

Castellanus clouds are evidence of mid-atmospheric instability and a high mid-altitude lapse rate. They may be a harbinger of heavy showers and thunderstorms and, if surface-based convection can connect to the mid-tropospheric unstable layer, continued development of Castellanus clouds can produce cumulonimbus clouds.

Altocumulus castellanus clouds are typically accompanied by moderate turbulence as well as potential icing conditions. For these reasons, flight through these clouds is often best avoided by aircraft.

References

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

cumulus gliding-technology

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