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A lenticular cloud at sunset over southern Alberta, Canada. The clouds often accompany strong "chinook" winds on the lea side of the Canadian Rockies. These dry, warm 'snow-eater' winds can abruptly melt as much as a foot of snow in one day, rapidly raising temperatures as much as 40°C (75°F).
A blanket of altocumulus with cumulus fractus below, spotted over Boca Raton, Florida, US
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A mixed sky following days of grey cloud cover, spotted over Garrabost, Isle of Lewis, Scotland
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Altocumulus lenticularis spotted over southern Corsica, France
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Criss-crossing contrails spotted over Seattle, Washington, US
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Sunset over Taoyuan, Taiwan
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Signs of a storm system near Le Havre, France
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Crepuscular rays and shadows spotted from Cijin Beach, Kaohsiung, Taiwan
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Sunset over New Taipei City, Taiwan
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A textured layer of stratocumulus over Somerset, England
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A colourful mosaic spotted near Tainan, Taiwan
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Cloud streets spotted at sunset near Vermontville, Adirondacks, New York, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', forms when stable, moist air flows over a large obstacle such as a mountain, creating waves that cause the clouds to form at the crests. In this classic example, there are multiple, stacked layers of these lens-shaped clouds, spotted over Torres Del Paine National Park, Patagonia, Chile.
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Cumulus congetus 'peeking' over the White Mountains and the Ancient Bristlecone Pine Forest in Inyo County, near Bishop, California, US
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A rainbow, created by sunlight that interacts with water droplets through the process of refraction, reflection, and dispersion, spotted over Forestville, California, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted in the lee of Mount Pantokrator, Corfu, Greece
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