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Other Clouds
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Optical Effects
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Cumulus humilis, which are cumuliform clouds with little vertical extent and are common in the summer, spotted over Mirror Lake, near the Adirondack Mountains and the Olympic Village of Lake Placid, New York, US.
Crepuscular rays and shadows during sunset over Cefalu, Sicily, Italy
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Lacunosus over Curtin, Canberra, Australia
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Altocumulus lenticularis by way of a stacked form, also known as pile d'assiettes, spotted in multiple places over Mercogliano, Italy
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Crepuscular rays over Galashiels, Scottish Borders, Scotland
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Sunrise with what is called a "pop-up" squall off to the right side of this colorful scene over the Atlantic Ocean, as viewed from Boca Raton, Florida, US
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Although mamma (mammatus) usually form on the base of a cumulonimbus anvil, they can also form on other cloud types such as stratocumulus, altostratus, or in this case, in a subtle way within altocumulus, spotted here over Monte Porzio Catone, Rome, Italy.
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Cirrocumulus with signs of a possible cavum (fallstreak hole), spotted over Kingston, Tasmania, Australia
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Sunset near Antelope Valley, California, US
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Iridescence with some cumulus fractus over New Taipei City, Taiwan
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Undulatus over Weymouth, Dorset, England
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Altocumulus stratiformis over Yeonsu-gu, Incheon, South Korea
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Asperitas over Puyallup, Washington, US
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Sun Dog over Craigville Beach, United States
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Clouds illuminated by moonlight, urban light, and lightning over Montezuma Creek, Utah, US
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Altocumulus in both its stratiformis and lenticularis forms, along with undulatus and cumulus fractus in this mixed sky over Neibla, near Valdivia, Chile.
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