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Optical Effects
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Altocumulus undulatus radiatus over Brisbane, Australia
Crepuscular rays and shadows during sunset over Brown County, Minnesota, US
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Undulatus on full display, spotted by Peter's sister, Martha Yaney, over Darien, Connecticut, US
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Altocumulus undulatus radiatus spotted over West End, Brisbane, Australia
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Altocumulus undulatus radiatus spotted over Taringa, Queensland, Australia
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Reflections of altocumulus lenticularis over Mirror Lake, Lake Placid, New York, US
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Multiples examples of cumulonimbus incus, also known as anvil clouds, along with a lower layer of altocumulus undulatus, as seen from 37,000 feet above Mississippi, US
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The sheep didn't appear to be interested in the plethora of altocumulus lenticularis over Priddy, Somerset, England
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Asperitas following a storm over Bismarck, North Dakota, US
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Stratocumulus lenticularis, a less common formation of lenticular clouds, which develop at a lower level of the atmosphere, spotted over Bairnsdale, Victoria, Australia
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Altocumulus lenticularis stacked one above the other, caused by wave motion in multiple humid layers of air, also known as "pile d'assiettes", spotted near the Cholla Cactus Garden, Joshua National Park, California, US
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", spotted over Proserpine, Queensland, Australia
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A vivid display of mammatus (mamma) over College Station, Texas, US
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Altocumulus undulatus over the Outback near Coober Pedy, Australia
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A classic example of asperitas spotted during the early morning over Tours, France
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Undulatus over Whitley Bay, England
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