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Altocumulus lenticularis spotted over southern Corsica, France
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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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted in the lee of Mount Pantokrator, Corfu, Greece
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A cap cloud, a unique form of an Altocumulus lenticularis, spotted over Mount Jungfrau, Switzerland
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A low lying stratocumulus lenticularis spotted near Minchinhampton, Gloucestershire, England
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A picturesque sunset viewed over railroad tracks, near Zagreb, Croatia
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Following a few days of white mist/rain that concealed the mainland, a grand display of clouds became visible near the Isle of Skye, spotted while looking across to mainland hills and Loch Hourn, Scotland
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Altocumulus lenticularis spotted at sunset over Antelope Valley, California, US
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Subtle signs of altocumulus lenticularis and potentially supercilium, spotted behind passing cumulus over South Melbourne, Victoria, Australia
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A grand display of altocumulus lenticularis spotted over Kvaløya, Norway
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A view which, as Roger points out, allows for significant permutations of skies and clouds, and one that late in the day is not unlike an artist's palette, spotted from Gaw Hill, Ormskirk, England.
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Signs of altocumulus lenticularis amidst the variety of cumulus in the sky over Belgium
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Altocumulus lenticularis spotted over Omak, Washington, US
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Altocumulus lenticularis spotted over Los Alamos, New Mexico, US
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Altocumulus undulatus spotted by Haruko's friend, Janet, over Vinalhaven Island, off the coast of Maine, US
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Altocumulus lenticularis duplicatus in a shape that looks like a 'tornado', spotted looking southwest from Salem, Oregon, US
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