Cirrus fibratus

Cirrus fibratus, also called Cirrus filosus, ^[2] is a type 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," yet different in that fibratus clouds do not have tufts or hooks at the end.^[4] The filaments are usually separate from one another.^[5]

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[1]
Precipitation	No

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

See also

• List of cloud types