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Altocumulus lenticularis spotted over southern Corsica, France
Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', forms when stable, moist air flows over a large obstacle such as a mountain, creating waves that cause the clouds to form at the crests. In this classic example, there are multiple, stacked layers of these lens-shaped clouds, spotted over Torres Del Paine National Park, Patagonia, Chile.
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A cap cloud, a unique form of an Altocumulus lenticularis, spotted over Mount Jungfrau, Switzerland
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Taken during their daughter's wedding, an expansive view of virga was spotted near Santa Fe, New Mexico, US
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Altocumulus lenticularis spotted at sunset over Antelope Valley, California, US
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Orographic cumulus as a result of moist air being forced to rise over a mountain or hill, as spotted here near Paneveggio, Italy
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A grand display of altocumulus lenticularis spotted over Kvaløya, Norway
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Fluctus (Kelvin-Helmholtz), a short-lived formation, was spotted amidst windy conditions over Vieste, Puglia, Italy
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Altocumulus perlucidus spotted over San Francisco, California, US
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Altocumulus floccus perlucidus spotted over Pengpeng Beach, near Baisha Township, Penghu County, Taiwan
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Fallstreak Hole (Cavum) spotted over Anduze, France
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Altocumulus lenticularis spotted over Los Alamos, New Mexico, US
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Fallstreak Hole (Cavum) spotted over Leichhardt, New South Wales, Australia
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Altocumulus stratiformis undulatus, also known as a mackerel sky, was captured by Carl McGarrigle, who also remarked 'I forgot to iron the sky this morning'. This classic example was spotted over Preston, Lancashire, England.
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Cumulonimbus Incus spotted to the northeast of the East Texas Regional Airport, Longview, Texas, US
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Fallstreak Hole (Cavum) spotted over Sydney, Australia
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