What are cirrus clouds?

Answer:

Cirrus clouds are thin, white clouds that have a wispy, feathery appearance. They form at heights of 25,000 feet or more. They are composed of tiny ice crystals, and are associated with fair or pleasant weather.

They have a hair-like appearance, and the curled-up ends are very common features.

First answer by Ganderton. Last edit by Happypup777. Contributor trust: 1 [recommend contributor recommended]. Question popularity: 53 [recommend question].