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Optical Effects
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Altocumulus lenticularis with a line of cumulus congestus along the horizon, spotted near Roughfields, Hadfield, Derbyshire, England
An elongated form of an altocumulus lenticularis spotted over Dungeon Ghyll, Cumbria, England
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Cumulus congestus viewed from the summit of The Brocken, the highest mountain in northern Germany, spotted over Harz National Park, Germany
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Spotted from inside a train, undulatus near Milton Keynes, Buckinghamshire, England
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Mammatus (Mamma) over Hadfield, Derbyshire, England
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Cirrus over Lincolnshire, England
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Virga over Glossop, England
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Virga, also viewed as "jellyfish clouds", spotted over Longdendale, Derbyshire, England
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