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Optical Effects
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Undulatus over Whitley Bay, England
A classic example of asperitas spotted over the Black Mountains, Western North Carolina, US
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Altocumulus in the foreground, with cumulus congestus along the horizon, spotted from New Taipei CIty, Taiwan
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Undulatus that is showing signs of asperitas, spotted over Gibsons, British Columbia, Canada
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The swirling nature of clouds when high altitude winds shift in direction, as spotted by Carole's friend near Tisbury, Wiltshire, England
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An intricate pattern in the sky, accompanied by subtle crepuscular rays, spotted during the morning hours over Calistoga, California, US
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Undulatus at sunset over Crank, Merseyside, England
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Altocumulus stratiformis undulatus over New Taipei City, Taiwan
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Undulatus over Taipei, Taiwan
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Undulatus spotted over Fenglin Village, Shiding District, Taiwan
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Altocumulus that resembles a chicken, spotted over Cooma, New South Wales, Australia
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Altocumulus lenticularis with iridescence, spotted over El Paso, Texas, US
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Horseshoe vortex spotted over North Dundas Township, Ontario, Canada
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Altocumulus lenticularis in the foreground, with cumulus congestus in the background, spotted near Cheektowaga, New York, US
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Asperitas in a view that resembles a painting, spotted from the top of the mountains outside of Shenandoah National Park, near Lydia, Virginia, US
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Undulatus along with what appears to be part of a 22-degree halo, spotted over Southern California, US
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