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This extraordinary group of clouds moved in rapidly from the west. There are several pathes of cloud each trailing very long wisps of virga. |
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As one of the patches passed over a few minutes later a circumzenithal arc was visible. |
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From the way the right edge of the arc is cut off it is clear that it was formed by crystals in the falling virga not the parent cloud above. |
Canon EOS 20D 10th October 2009
Wiltshire, England
