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Optical Effects
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Asperitas, Canet de Mar, 40 km north of Barcelona. Spain. (
Signs of mammatus (mamma) and virga within this developing, elevated storm near North Dundas Township, Ontario, Canada
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An advancing arcus, indicating the leading edge of a storm, spotted over Milano, Italy
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Cirrostratus spotted over Kirkkonummi, Finland
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Signs of virga spotted over Bellingham, Washington, US
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A developing Cumulonimbus spotted over Twisp, Washington, US
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Cumulonimbus spotted near Kingman, Arizona, US
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Virga spotted at sunrise over Wells, Somerset, England
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Altocumulus undulatus spotted during sunrise over Port Kennedy, Perth, Western Australia, Australia
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Signs of virga spotted over Westbury sub Mendip, Somerset, England
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A glory, an optical phenomenon observed when gaining elevation, is seen when the sun is directly behind a person, as it casts a shadow on to a layer of cloud or mist. The glory is produced by cloud/water droplets reflecting, refracting, and diffracting sunlight. This classic example was spotted from Pigeon House Mountain / Didthul, Morton National Park, New South Wales, Australia.
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Cirrus fibratus spotted over Victoria, British Columbia, Canada
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Undulatus spotted at sunset near Taylor, Texas, US
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Cumulus fractus over Iowa City, Iowa, US
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A colourful display of Altocumulus cloud formations, spotted over Lyle, Washington, US
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Altocumulus and Altostratus spotted over Mubwayaka Lake, Algonquin Park, Ontario, Canada
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