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Cirrostratus Clouds - Windows to the Universe

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This is a photograph of cirrostratus clouds near Moab, Utah.
Click on image for full size
Courtesy of Anne Pharamond

Cirrostratus

Cirrostratus clouds belong to the High Cloud group. They are sheetlike thin clouds that usually cover the entire sky.

The sun or moon can shine through cirrostratus clouds. When looking at the sun through cirrostratus clouds, sometimes you will see a halo around the sun that is the width of your hand when you hold it out at arm's length.

Cirrostratus clouds usually come 12-24 hours before a rain or snow storm.


Last modified September 25, 2007 by Becca Hatheway.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF