How High Do Cirrostratus Clouds Form

Cirrostratus is usually located above 5.5 km (18,000 ft). Its presence indicates a large amount of moisture in the upper troposphere. Clouds resembling cirrostratus occasionally form in polar regions of the lower stratosphere.

Are cirrostratus clouds high?

Cirrostratus are transparent high clouds, which cover large areas of the sky. They sometimes produce white or coloured rings, spots or arcs of light around the Sun or Moon, that are known as halo phenomena. Sometimes they are so thin that the halo is the only indication that a cirrostratus cloud is in the sky.

Are Stratonimbus clouds tall?

Stratus cloudGenusStratus (layered)SpeciesFractus NebulosusVarietyOpacus Translucidus UndulatusAltitude0-2,000 m (0-7,000 ft)