Cirrocumulus lacunosus

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Cirrocumulus lacunosus
Cirrocumulus lacunosus.jpg
Cirrocumulus lacunosus clouds
AbbreviationCc la
SymbolCH 9.png
GenusCirro- (curl of hair)
-cumulus (heaped)
Varietylacunosus (full of holes)
AltitudeAbove 6,000 m
(Above 20,000 ft)
Appearanceperforated with round, frayed holes[1]
Precipitation cloud?No

Cirrocumulus lacunosus is a type of cirrocumulus cloud. The name cirrocumulus lacunosus is derived from Latin, meaning "full of hollows".[2] Cirrocumulus lacunosus is a relatively rare cloud form that occurs as a layer of cloud with circular holes in it. Formation is commonly attributed to a cool layer mixing with a warmer, higher layer of the atmosphere.[3][4] These holes normally have frayed edges, and they are often arranged in a manner that resembles a net or a honeycomb.[5]

Closer detail of structure - photographed high over Riana, Tasmania Australia Sept 2020

See also[edit]


  1. ^ Wolken-Online. "Cirrocumulus". Cloud Atlas. Retrieved 21 July 2011.
  2. ^ Numen - The Latin Lexicon. "Definition of stratus". Retrieved 21 July 2011.
  3. ^
  4. ^ Dunlop, Storm (2003). The weather identification handbook (1st Lyons Press ed.). Guilford, Conn.: Lyons Press. p. 67. ISBN 1-58574-857-9.
  5. ^ Callanan, Martin. "Cirrocumulus lacunosus". International Cloud Atlas. Retrieved 21 July 2011.

External links[edit]