Cirrus CloudsCirrus Clouds are high clouds, usually forming 6 000 metres up in the atmosphere. Due to high winds at this height, cirrus clouds look like faint, wispy streaks across the sky.
Cirrus clouds are usually present on days when the weather is fair, however it also indicates a change in weather with winds bring the change. These clouds are made up mostly of ice crystals high in the atmosphere. There are two main types of cirrus clouds: cirrostratus and cirrocumulus. Cirrostratus Clouds Cirrostratus clouds can be identified by thin smooth sheets of clouds. Due to their thin structure they are slightly transparent which allows the sun and moon to easily be seen through them. In many cases the light from the moon can cause a ring, called a halo, around the moon. Halo's are cause when the light of the moon reflects of the icy crystals in the sky. While these clouds do not produce rain, they are a sign of impending rain and worsening weather to come.
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