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An active sky with virga in the distance, near Winchester, Ontario, Canada
Vibrant cirrus cloud formations that remind Modestino of burning flames, spotted over the National Park of Abruzzo, Barrea, Italy
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Asperitas in the late afternoon near Vermontville, Adirondacks, New York, US
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A plethora of colour on both the land and in the sky, during a spring sunset over Stephens Lake Park, Columbia, Missouri, US
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The marine layer that often graces the flanks of the mountain during the month of August, also known as "Fogust" per Anthony's description, seen near Mount Tamalpais, Marin County, California, US
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Cirrus fibratus that is also bringing forth a couple of shadows between differing levels in the troposphere, spotted over Meinohama Fishing Port, Fukuoka City, Japan
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A photograph that looks like a painting of the sky, near Malakwa, British Columbia, Canada
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Cirrus spissatus over Oakland, California, US
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A storm system in development over Lake Tuggeranong, Canberra, Australian Capital Territory, Australia
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Altocumulus lenticularis over Cooper Bay on the eastern side of South Georgia, South Sandwich Islands, British Overseas Territory
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Virga spotted over Saint Cyr la Rosiere, France
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A stunning reflection of mammatus (mamma) over Stoneridge Lake, Yukon, Oklahoma, US
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A classic and vivid example of cirrus uncinus over Somerset, England
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Haar or sea fret, also known as a cold sea fog, occurs most often on the east coast of Scotland between April and and September, when warm air passes over the cold North Sea, is seen here over Coll Beach, Isle of Lewis, Scotland
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It looks calm, but Monica conveyed that it was very windy when she found the perfect place to pull her car over and take this photograph of the full rainbow over Mono Lake, California, US
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A classic example of a 22-degree halo over Northern California, US
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