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Other Clouds
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Optical Effects
- 22° Halo
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- Wegener arc
A classic example of a fallstreak hole (cavum) spotted amidst an expansive display of altocumulus clouds over Lot, Occitanie, France
Multiple fallstreak holes (cavum) spotted over Sebastopol, California, US
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Cavum (Fallstreak Hole) spotted over Lynchburg, Virginia, US
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Fallstreak Hole (Cavum) over Catforth, Preston, England
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Cavum (Fallstreak Hole) over North Brunswick, New Jersey, US
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Cavum (Fallstreak Hole) spotted over Fort St. John, British Columbia, Canada
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A unique combination of a sun dog within an elongated cavum (fallstreak hole), spotted over London, Ontario, Canada
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A spectacular fallstreak hole (cavum) spotted near Seattle, over Snohomish, Washington, US
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Multiple fallstreak holes (cavum) joined together over Charlotte, Michigan, US
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Cirrocumulus with signs of a possible cavum (fallstreak hole), spotted over Kingston, Tasmania, Australia
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A classic fallstreak hole (cavum) over Charlotte, Michigan, US
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A unique juxtaposition of what appears to be a Cavum (Fallstreak Hole), along with a Circumhorizon Arc, spotted over Cape Coral, Florida, US
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Cavum (Fallstreak Hole), which is formed when part of the cloud layer forms ice crystals which are large enough to descend as a "fallstreak". They form in clouds of supercooled water droplets, which in the end, creates a form of virga, a trail of ice crystals that doesn’t reach the ground, but evaporates before getting that far. This classic example was spotted over Charlotte, Michigan, US.
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A lowering of a layer of cloud, which appears to be a variation of a Cavum (Fallstreak Hole), spotted over Fayetteville, Arkansas, US
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Cavum (Fallstreak Hole) is essentially, in the end, a form of virga, wherein a particular trail of ice crystals doesn’t reach the ground, but instead, evaporates prior to that point. This classic example was spotted over Seaford, East Sussex, England.
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A classic example of a Cavum (Fallstreak Hole) over Longham, Dorset, England
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