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Cirrus vertebratus homogenitus, which developed from the remnants of a contrail, spotted over Lake Stevens, Washington, US
Winds coming eastward off of the Cascade mountains create a shearing effect that contributes to the variety of high level cirrus clouds over Cle Elum, Washington, US
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Cirrus vertebratus spotted over Hammersmith, West London, England
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Cirrus vertebratus stemming from what appears to originally be a contrail, spotted over Folsom, California, US
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Cirrus vertebratus homogenitus forms as a result of an aircraft condensation trail (contrail). The spine of the cloud begins as a contrail and is aligned to the flow of the high winds, whose water droplets freeze into ice crystals that fall below into slower, moister airflows. This variation was spotted over Kenilworth Gardens, Melksham, England.
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Sunset as viewed from Whidbey Island, Washington, US
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Cirrus vertebratus spotted over Crawley, West Sussex, England
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Cirrus vertebratus formed by what appears to have been a former contrail, over Benafim, Algarve, Portugal
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A grand display of Cirrus vertebratus radiatus over Brean, Somerset, England
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Cirrus in the distance over Ryazan, Russia
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An evolving contrail over Moscow, Russia
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Cirrus vertebratus over Portsmouth, England
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Cirrus vertebratus over the Sierra Nevada mountains in Northern California, US.
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Cirrus vertebratus, A K A a feather, over the Catalina mountains, Tucson, Arizona, US.
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Spine like Cirrus over Acomb, York, England.
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A sunset over Death Valley, California, US.
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