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Other Clouds
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Optical Effects
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- Wegener arc
Altocumulus illuminated by the rays of sunrise with lower Stratocumulus lenticularis formations in shadow over Whiteface Mountain, Adirondack Mountains, NY, US.
Altocumulus lacunosus spotted in the evening over Baltimore, Maryland, US.
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Altocumulus undulatus clouds spotted over Baltimore, Maryland, US.
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A UFO-shaped Altocumulus lenticularis formation, and eyebrow-like features, with the unofficial name supercilium, forming in the turbulent air in front, spotted over Palm Springs, California, US.
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Altocumulus undulatus over East River, New York City, US.
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Asperitas clouds over northwest Connecticut, US.
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Three fallstreak holes, also known as cavum cloud features, spotted over North East Derbyshire, England.
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Cloud ridges known as undulatus in a mixed sky after a four-day blizzard spotted from the North Shore (Silver Bay) of Lake Superior, Minnesota, US.
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Altocumulus lenticularis spotted over Franklin County, Alabama, US, as well as some of the cloud holes called lacunosus and some of the eyebrow-like features that becoming unofficially known as 'supercilium'.
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The distinctive breaking-wave shape of a fluctus cloud feature was spotted here along the top of the accessory cloud cap known as a pileus. This is a rare combination of features, spotted over Franklin County, AL, US.
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Altocumulus at sunset over Aix-en-Provence, France.
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Altocumulus clouds or a phoenix flying into the sunset, depending on how you look at it, spotted over Santa Barbara, California, US.
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Parallel ridges of Altocumulus cloudlets, known as undulatus, going this way and that at two different levels, known as duplicatus.
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Cumulus, Stratocumulus and Altocumulus vie for attention over the Adirondack Mountains, New York, US.
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Altocumulus at sunset over Buckeye, Arizona, US.
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The flying-saucer cloud, Altocumulus lenticularis, spotted over Stellenbosch in the Western Cape, South Africa by Stuart Loveday, who assured us ‘no aliens were spotted by me that day’.
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