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Other Clouds
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Optical Effects
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An arcus ushering in a storm system over Somerset, England
Pyrocumulus as a result of the Mine Creek Fire, approximately 48 kilometers to the south of Lower Nicola, British Columbia, Canada
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A roll cloud, or volutus, which is a rare, low horizontal tube-shaped arcus cloud, detached from the parent storm cloud, and represents the leading edge of a thunderstorm's gust front. This example was spotted between Vinylhaven Island and the Rockland area of the Mid-Coast, near Penobscot Bay, Maine, US.
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Altocumulus lenticularis spotted at sunset over the Sangre de Cristo Mountains north of Santa Fe, New Mexico, US
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Multiple fallstreak holes (cavum) spotted over Somerset, England
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Fallstreak Hole (Cavum) spotted from Freshwater Bay over Isle of Wight, England
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Altocumulus undulatus radiatus over Brisbane, Australia
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Horseshoe vortex spotted in the early evening over Hereford, Arizona, US
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Crepuscular rays and shadows during sunset over Brown County, Minnesota, US
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Virga illuminated by the setting sun over Owens Valley, California, US
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A well-defined arcus marks the leading edge of this storm system, which is accompanied by asperitas and signs of lacunosus, near Fort Wayne, Indiana, US
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Mammatus (Mamma) at sunset over Hyderabad, India
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Pileus are small, horizontal clouds that form above cumulus or cumulonimbus clouds, due to rising air that condenses into a smooth shape upon reaching its dew point, and this formation is usually an indicator of severe weather. This classic example was spotted over Bethesda, Maryland, US.
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Crepuscular rays emanating from behind a developing storm near Trentino Alto Adige, Peio, Italy
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Lightning stretching out from within a storm east of Boston, Massachusetts, US
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Undulatus on full display, spotted by Peter's sister, Martha Yaney, over Darien, Connecticut, US
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