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Optical Effects
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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).
Cumulus that Rachel thought looked like a smoking dragon, or perhaps a lake monster, spotted near North Dundas Township, Ontario, Canada
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Sunrise as captured by Joan Mello Corda over Orleans, Massachusetts, US
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Gale force winds accompanied by a cap cloud, which is a form of pileus, characterized by a smooth, almost lenticular-like appearance on top of a cumuliform tower and/or an isolated mountain peak, as seen here over the Faroe Islands.
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A sunrise that was so crystal clear that Dean thought it looked like there was lava flowing in the valley, seen here over Española Valley, north of Santa Fe, New Mexico, US
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Stratocumulus over Khomeynishahr City, Esfahan, Iran
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Crepuscular rays at sunrise over the Atlantic Ocean, as seen from Boca Raton, Florida, US
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Subtle reflections of cumulus along Green Lake, Seattle, Washington, US
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A view of cumulus to the north, near Modbury Heights, Adelaide, South Australia, Australia
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Cumulus congestus spotted by Bridget's mother during the evening near Passive, France
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Signs of mammatus (mamma) in this dissipating storm system, spotted in the "Hill Country Strong" area of Kerrville, Texas, US
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Altocumulus over Pittsburgh, Pennsylvania, US
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While cloud spotting at the local airport, Nancy was reminded of a feather with this particular formation over Corvallis, Oregon, US
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Remnants of a dissipating storm system over the Philippine Sea
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On an early summer afternoon, Junichi spotted what appeared to be clouds that were dancing over Hakata Station, Fukuoka City, Japan
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After arriving home following his work day, Daniel spotted this sky at sunset over Erlensee, Germany
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