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Altocumulus lenticularis forming over the front range of the Colorado Rockies, near Boulder, Colorado, US
Sentinel and his Dog Cloud hovering over the concreted land masses and solitary streets created by artist Alberto Burri in 1984/1989 to honour the people of Gibellina the Sicilian town destroyed in a 1968 earthquake. Neville provided this description and submitted the photograph, taken near Gibellina, Sicily, Italy.
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This photograph is called "Algumas Ondas no Ceu", per Nicolas' title, which means "some waves in the sky," spotted over Balneario Arroio do Silva, Santa Catarina, Brazil
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Virga over Boise, Idaho, US
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Sun Dog (Parhelion) spotted over Lismullen and Navan, Meath, Ireland
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Undulates filling in where there appears to have been a fallstreak hole in the shape of a hexagon, spotted over Jeju, South Korea
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Sun Dog (Parhelion) spotted over Ormskirk, Lancashire, England
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Cumulus obscuring the sun, accompanied by high level cirrus clouds, over North Devon, England
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Multiple contrails over Falls Church, Virginia, US
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Rainbow over Manchester, Connecticut, US
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A dynamic storm system illuminated by the setting sun over San Francisco Bay, near Oakland, California, US
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Fluctus (Kelvin-Helmholtz) spotted on a cold and dry day by Gary Norris in Clynder, Scotland
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An "X" marks the spot between these two contrails, spotted over Taipei, Taiwan
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Cumulus congestus developing into a cumulonimbus amidst the backdrop of a blue sky over Northern California, US
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Contrails and its remnants high in the sky over Taiwan
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Lacunosus over Antelope Valley, California, US
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