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Revision as of 12:01, 29 January 2008

Article Information
Category: Weather Weather
Content source: Eurocontrol Eurocontrol
Content control: Eurocontrol Eurocontrol

Cirrostratus (Cs)

Description

High level, uniform layer of thin white cloud.

Layer of Cirrostratus seen from above at 34,000ft. In the distance a Cumulonimbus cloud can be seen pushing up through the Tropopause. Photo by Captain Murray O'Shea

Characteristics

Viewed from below the cloud, the sun and moon may be seen to have a bright halo with a red tinge to the edge.

Because of the high altitude, and therefore low temperature, cirrostratus clouds are composed of ice crystals rather than water particles.

Further Reading