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Other Clouds
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Optical Effects
- 22° Halo
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- Wegener arc
Cirrus uncinus over the Adriatic Sea, near San Cataldo, Lecce, Italy
Lacunosus, a short-lived cloud formation, was spotted over North Devon, England
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Distrail spotted over Washington D.C., US
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Cirrus clouds amidst the blue sky over Isle of Harris, Scotland
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A classic and vivid example of cirrus uncinus over Somerset, England
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Cirrus spissatus spotted over Oahu, Hawaii, US
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Circumzenithal Arc spotted over Brighton, Colorado, US
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Altocumulus lenticularis duplicates with cumulus fractus in the foreground, spotted over Patagonia, Argentina
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Cirrus uncinus on grand display near San Luis Obispo, California, US
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Circumzenithal Arc spotted by Moriah's 11-year-od brother, Anthony, who captured this image near Antelope Valley, California, US
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Cavum (Fallstreak Hole) spotted over Lynchburg, Virginia, US
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A grand display of virga, following a day that Martha described as being filled with cirrus uncinus, spotted over Asheville, North Carolina, US
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Cirrus spissatus, which is a thick cirrus cloud, is often accompanied by other species of cirrus clouds within close proximation. These clouds can be formed by a conglomerate of cirrus clouds at high altitudes, and separate from that origin, they can also form from the remnants of a dissipating thunderstorm that once had a fibrous top. This example of cirrus spissatus was spotted over Thumrait, Southern Oman, near the Yemeni border.
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Cirrus uncinus over Charlotte, Michigan, US
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Cirrus uncinus over Sanxia District, New Taipei City, Taiwan
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Circumhorizon Arc, which is an optical effect that is caused by ice crystals in the sky acting as tiny prisms that refract and reflect the light, and it appears as a bright, flat band of colours parallel to the horizon. When cirrus clouds are present, they act as a canvas for the circumhorizon arc, causing it to become fragmented. This classic example was spotted over Rosenheim, Germany.
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