Cirrostratus clouds can often produce a halo around the Sun. These clouds are made up of ice crystals because they are found so high in the sky.
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chalk.richmond.edu/education/projects/webunits/weather/...
chalk.richmond.edu/education/projects/webunits/weather/cirrostratus.html
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High level clouds are named cirrus, cirrostratus and cirrocumulus. Air temperatures at the altitudes these clouds form at can be less than -40 oC so these clouds are made of millions of tiny ice crystals, rather than water droplets.
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www.atmosphere.mpg.de/enid/25q.html
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While these clouds occur year round, they are not very frequent and are usually present with other cloud types. Cirrocumulus are often associated with large weather systems. Cirrostratus (Cs) Cirrostratus clouds can cover part or all of the sky.
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mapmaker.meteor.wisc.edu/~jbrunner/ackerman/sm-clouds/c...
mapmaker.meteor.wisc.edu/~jbrunner/ackerman/sm-clouds/cloudbkgrnd.html
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Then there's stratusstratus - low (stratus) and flat (stratus) - but since that is redundent, we just call them stratus. (I just made that up.) ... Cirrostratus are sheetlike, thin clouds that usually cover the entire sky. The sun or moon can shine through Cirrostratus clouds. Cirrostratus clouds usually come 12-24...
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boatsafe.com/kids/weather1.htm
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Clouds reflect all the colors the exact same amount so they look white. Clouds are made up of tiny water droplets or ice crystals, usually a mixture of both. The water and ice scatter all light, making clouds appear white. ... Cirrostratus clouds usually come 12-24 hours before a rain or snow storm.
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www.weatherwizkids.com/weather-clouds.htm
www.weatherwizkids.com/weather-clouds.htm
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Cirrostratus – all high clouds start with the word "cirro". These clouds occur when cirrus clouds spread into a thin, milky sheet. These are again made of ice crystals and the sun usually appears very bright through cirrostratus clouds.
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www.rcn27.dial.pipex.com/cloudsrus/cloudwatch.html
www.rcn27.dial.pipex.com/cloudsrus/cloudwatch.html
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Young Naturalist, Discovering Nature, Earth Sciences, Clouds ... The high clouds, which form between 20,000 and 40,000 feet, belong to the cirrus family and are all made of ice crystals. They include the cirrus, cirrostratus, and cirrocumulus clouds.
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www.tpwd.state.tx.us/publications/nonpwdpubs/young_natu...
www.tpwd.state.tx.us/publications/nonpwdpubs/young_naturalist/earth_sciences/clouds/index.phtml
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The tiny prisms of ice in a cirrostratus layer can bend the sun's light. As a result, often you can see a halo or veil of rainbow colors around the sun. When stratus clouds are very thick, ... Cirrus clouds are high and thin and made entirely of ice crystals. Forming above 20,000 feet in the atmosphere, they often look...
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www.wxdude.com/page9.html
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The Comping(Preview) Image(S) May Be Used for Comps And Layouts. ... Discover Sunsets & Clouds (miwt021) > Cirrostratus clouds, trees and sun rising over ocean (miwt021032) ... Cirrostratus clouds, trees and sun rising over ocean photo...
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www.inmagine.com/miwt021/miwt021032-photo
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