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Other Clouds
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Optical Effects
- 22° Halo
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- Wegener arc
Crepuscular rays and shadows during sunset over Brown County, Minnesota, US
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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Altocumulus lenticularis over Longyearbyen, Svalbard, Norway
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Pileus, also known as a cap cloud, can develop above rapidly rising cumulus or cumulonimbus clouds, as spotted here by Genevieve's father during an evening walk in Minneapolis, Minnesota, US
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Mammatus (Mamma), often associated with thunderstorms, are indicative of sinking cold air that's carried into warmer air layers and create the characteristic bumpy, rounded appearance, as seen here over Hovell's Creek, Geelong, Victoria, Australia.
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Mammatus (Mamma) spotted by Sara's niece over Montana State University, Bozeman, Montana, US
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An approaching storm system near Brighton, Colorado, US
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A developing storm system over Lake Maggiore, Piemonte, Italy
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Altocumulus undulatus radiatus spotted over West End, Brisbane, Australia
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Altocumulus undulatus radiatus spotted over Taringa, Queensland, Australia
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