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Cirrostratus undulatus, which Janet saw as resembling a herringbone, spotted during the evening near Tavistock, Devon, England
A giant fish was seen when Kate looked up at the sky over Hadfield, Derbyshire, England
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With the sun rising behind Aldo Brando, the photographer, these anti-crepuscular rays were spotted. Anti-crepuscular rays appear when tall clouds in front of the rising or setting sun cast long shadows across the sky which can be seen receding off into the distance when facing away from the sun, as was the case here, near Bogota, Colombia.
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A storm system near Gibsons, British Columbia, Canada
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Signs of fluctus (Kelvin-Helmholtz) spotted over Solihull, England
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Crepuscular rays over Italy
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A developing storm near Hunt Valley, Maryland, US
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A mixed sky over Tainan, Taiwan
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Cumulus congestus developing over the mountains near Sanxia District, New Taipei City, Taiwan
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Stratocumulus lenticularis, a less common formation of lenticular clouds, which develop at a lower level of the atmosphere, spotted over Bairnsdale, Victoria, Australia
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Crepuscular rays following a storm that contained hail, spotted over Xuzhou, Jiangsu, China
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Cumulus over Khomeynishahr City, Esfahan, Iran
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Reflections of a sunset over Brisbane, Australia
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A storm system wtih signs of rotation within its development, spotted over Brighton, Colorado, US
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Altocumulus lenticularis stacked one above the other, caused by wave motion in multiple humid layers of air, also known as "pile d'assiettes", spotted near the Cholla Cactus Garden, Joshua National Park, California, US
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Cirrostratus spotted over Northern California, US
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