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On a windy and exhilarating hike, Heather witnessed the development of this cap cloud, which forms as a stable airstream rises to pass over a peak, cooling as it does so. It is a particular variation of a lenticularis cloud, in which the cloud lies over the mountaintop, rather than downwind from it. This classic example was spotted from the Mount Fremont lookout at Mt. Rainier National Park, Seattle, Washington, US.
A classic example of a cap cloud, a particular example of an altocumulus lenticularis, forms as a stable airstream rises to pass over a peak, cooling as it does so. Deborah's son, Peter, spotted this unique cloud formation over what appears to be Mt. Adams as he was on a plane coming in to land at Portland, Oregon, US
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A classic cap cloud forming over Mount Rainier, Washington, US.
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A cap cloud over Mount Arenal, Costa Rica.
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A cloud capped mount Herðubreið, Iceland.
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Table mountain South Africa, wearing its cloud cover known as the tablecloth.
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A cap cloud, spotted while flying over Queen Charlotte Sound, in the Marlborough Sounds, New Zealand.
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A cloud-capped summit of Mount Chimborazo in Equador.
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A cap cloud over Mount Shasta, the Cascade Range, Siskiyou County, California, US.
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A banner cloud over the Grand Teton, Wyoming, US.
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A cap cloud over Mount Hood, Oregon, US.
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A cap cloud over Quendale in Shetland.
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Cap cloud over Karbonkelberg, Table Mountain National Park, Cape Town, South Africa.
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A cloud-capped Mount Teide, Tenerife.
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A cloud capped Mount McKinley, (known as "Denali".) This is the tallest mountain in North America, with a summit elevation of 20,310 feet (6,190 m) above sea level, located in the Denali National Park, Alaska.
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A cloud-capped Mount Shasta, California, US.
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