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Optical Effects
- 22° Halo
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- Wegener arc
This formation over Biddenden, Kent, UK, is often a sign of imminent thunderstorms or an active cold front.
1 thought on “Harry van Dijken”
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Virga with a subtle rainbow spotted over the Adirondack Mountains, Vermontville, New York, US
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Altocumulus and Cumulus fractus spotted over Zhongzheng District, Taipei City, Taiwan
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A gap in cloud cover just beyond the edge of cumulus congestus, spotted over San Juan, Puerto Rico
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Fluctus (Kelvin-Helmholtz) spotted over the Rockies, near Brighton, Colorado, US
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Fall Larch trees in the fog near Bigfork, Montana, US
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Marmalade colored cloud spotted in the early evening over Goodyear, Arizona, US
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Burton on Trent, England
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Fog spotted by Alina Payne, from the Settignano Hills over the valley in Florence, Italy
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Virga spotted over Allendale, Michigan, US
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A classic example of a rare horseshoe vortex spotted over Roanoke, Virginia, US
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A layer of altocumulus above what appears to be low-lying stratus clouds formed via homogenitus, as a result of the nearby power plant and a variety of particles that act as condensation nuclei. This view overlooking Uskmouth Power Station, South Wales, is from Portishead, Somerset, England.
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A view from above the clouds, of a layered "field" of low-lying clouds, with a textured or rolling appearance, giving the indication that this is a layer of stratocumulus clouds, spotted during a flight over Albania
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Autumn view of Altocumulus stratiformis, spotted from Pinnacles Youth Park, Boone County, Missouri, US
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A blend of colours over Medford, Massachusetts, US
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Sunrise over San Leandro, California, US
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I sat on Penarfynydd once and watched an example of this moving in across the sea. The air behind the line was visibly of a different quality to the air ahead – a difference that is impossible to describe except with vague references to clarity and colour.