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Optical Effects
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Fallstreak Hole (Cavum) spotted in the early morning over Greenfield, California, US
A distrail slicing through Cirrocumulus stratiformis undulatus, spotted over Highland Lake, East Andover, New Hampshire, US
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Altocumulus stratiformis undulatus, spotted in the late afternoon over Vermontville, Adirondacks, New York, US
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Altocumulus stratiformis spotted over Sacramento, California, US
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A mixed sky over Dalton Highway, near Coldfoot, Alaska, US
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A colourful display of Altocumulus cloud formations, spotted over Lyle, Washington, US
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Altocumulus stratiformis spotted over Humboldt Bay, Eureka, California, US
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Signs of a Cavum (Fallstreak Hole) spotted over Sky Valley, California, US
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Altocumulus stratiformis spotted over Nord-Ostsee-Kanal in Sehestedt, Schleswig-Holstein, Germany
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Altocumulus stratiformis over Petaling Jaya, Selangor, Malaysia
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A vast display of Altocumulus spotted near Mt. Shasta, California, US
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High level Altocumulus spotted over Haddington, Scotland
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Altocumulus stratiformis submitted by Gabrielle de Yorvick, spotted by Mary Morton near Holgate, York, England
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A mixed sky over Swindon, Wiltshire, England
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Altocumulus stratiformis spotted over Carlton, Washington, US
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Altocumulus stratiformis spotted by Christiane's daughter, with a view of Mt. Rainier, near Seattle, Washington, US
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