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Cirrus fibratus
Cirrus fibratus
Abbreviation	Ci fib
Symbol
Genus	Cirrus (curl)
Species	fibratus (fibered)
Altitude	Above 6,000 m; (Above 20,000 ft)
Classification	Family A (High-level)
Appearance	fibers, threads
Precipitation	No

Cirrus fibratus or also called Cirrus filosus ^[2] is a species of cirrus cloud. The name cirrus fibratus is derived from Latin, meaning "fibrous".^[3] These clouds are similar to cirrus uncinus, commonly known as "mares' tails"; however, fibratus clouds do not have tufts or hooks at the end.^[4] The filaments are usually separate from one another.^[5]

Like other cirrus clouds, cirrus fibratus occur at high altitudes. They can indicate an approaching warm front;^[6] however, they can also be an indication that fair weather will follow.^[7]

References

^ Wolken Online. "Cirrus". Cloud Atlas. Archived from the original on 3 April 2019. Retrieved 13 July 2011.
^ "Appendix 3 - History of cloud nomenclature".
^ Numen - The Latin Lexicon. "Definition of fibratus, fibratus". Retrieved 13 July 2011.
^ Dunlop, Storm (2003). The weather identification handbook (1st Lyons Press ed.). Guilford, Conn.: Lyons Press. p. 56. ISBN 1-58574-857-9.
^ Callanan, Martin. "Cirrus fibratus". International Cloud Atlas. nephology.eu. Archived from the original on 24 February 2020. Retrieved 13 July 2011.
^ Wolstanton Weather. "Cumulus Clouds". Clouds. Archived from the original on 27 March 2012. Retrieved 13 July 2011.
^ The Weather Observer. "Cirrus Fibratus (Ci fib)". Archived from the original on 27 March 2012. Retrieved 13 July 2011.