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Optical Effects
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An asperitas formation over Zandvoort, the Netherlands.
Returning from a weekend in the country, Frits spotted this evening sky, with crepuscular rays in the distance, near Gent Zwijnaarde, Belgium
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A blanket of altocumulus spotted from the Great Wall of China, near the Changping District, Beijing, China
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A view which, as Roger points out, allows for significant permutations of skies and clouds, and one that late in the day is not unlike an artist's palette, spotted from Gaw Hill, Ormskirk, England.
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A range of colours and clouds spotted over Taiwan
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Altocumulus perlucidus spotted over San Francisco, California, US
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A plethora of contrails illuminated by the full moon, spotted over Covarrubias, Burgos, Spain
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Altocumulus floccus perlucidus spotted over Pengpeng Beach, near Baisha Township, Penghu County, Taiwan
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Cirrus uncinus spotted over Granite Bay, California, US
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Moon Dogs spotted over Chippenham, Wiltshire, England
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Signs of altocumulus lenticularis amidst the variety of cumulus in the sky over Belgium
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A feather-like cloud forms from the remnants of a contrail, spotted over Cirencester, England
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Full moon illuminating altocumulus a couple of hours after sunset, spotted over Madison, Wisconsin, US
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Crepuscular rays over Iligan City, Philippines
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Altocumulus lenticularis spotted over Omak, Washington, US
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Mammatus (Mamma) that preceded rainfall over Daventry, Northamptonshire, England
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