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| 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 cloud? | No |
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]
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] Fibratus clouds indicate high, continuous winds up at cloud level.