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A primary rainbow and a subtle secondary rainbow spotted during a storm near Mercogliano, Italy
Early morning dense fog along the Jewel Basin Hiking Area, near Bigfork, Montana, US
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Multi-level view of the stratus cloud type as seen from the summit of the Whiteface Mountain Ski Center in the Adirondacks, Lake Placid, New York, US
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Sunset with altocumulus lenticularis, framed by bare branches of a hawthorn hedge, near Ormskirk, West Lancashire, England
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A reflection of an expansive display of altocumulus stratiformis undulatus over Meinohama Fishing Port, Fukuoka City, Japan
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Altocumulus with the view of the moon spotted during the early evening over the hills of Laguna Niguel, California, US
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Cumulonimbus viewed at night, near Siler City, North Carolina, US
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Cirrocumulus cloud formation that appears to have originated from a contrail, spotted near Walnut Creek, California, US
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Cirrocumulus undulatus over Jilin Province, China
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Mammatus (Mamma) spotted over Woden, Canberra, Australia
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Nacreous over Lauvland, Norway
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A vivid sunset, as photographed by Moriah's sister, Brianna Rivas, near Antelope Valley, California, US
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Crepuscular rays over Pitman, New Jersey, US
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A storm system with a well-developed arcus, also known as a shelf cloud, near Cotia, Sao Paolo, Brazil
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Signs of lenticularis that Alan commented looks like a hen, spotted over Scotland
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