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Other Clouds
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Optical Effects
- 22° Halo
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- Upper tangent arc
- Wegener arc
Fallstreak Hole (Cavum), which occurs when supercooled water droplets freeze, creating ice crystals that become heavy and fall below as virga. This classic example was spotted over Maroochydore, Queensland, Australia.
Fallstreak Hole (Cavum) within a layer of Altocumulus perlucidus translucidus, spotted over Whitstable, Kent, England
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Altocumulus perlucidus spotted shortly after sunrise over Falls Church, Virginia, US
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Altocumulus perlucidus translucidus spotted over Frosinone, Italy
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Altocumulus stratiformis translucidus spotted over Vale of White Horse, Oxfordshire, England
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Lunar iridescence over Tadcaster, North Yorkshire, England
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Altocumulus perlucidus translucidus over Nanchang, Jiangxi Province, China
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An expansive display of altocumulus stratiformis undulatus over Portimao, Algarve, Portugal
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Altocumulus translucidus over Pewsey, Wiltshire, England
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Altocumulus cloudlets lined up into rows, known as undulatus, spotted over East Tisted, Hampshire, England.
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A number of variations on the theme of Cirrocumulus over Cheyenne, Wyoming, US.
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A translucent sky over Grenoble, France.
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A hint of coronal colour in the afternoon, over a frozen Lake Cora, Lawrence, Michigan, US.
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An early morning view from Queensland, Australia.
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A translucent cloudscape over Mill Valley, California, US.
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An example of Altocumulus translucidus over Kalispell, Montana, US.
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