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Main Cloud Types
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Other Clouds
- Arcus
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- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
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- Flammagenitus (Pyrocumulus)
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- Pannus
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- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
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- Stratiformis
- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
- Undulatus
- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
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- Parry infralateral arc
- Parry supralateral arc
- Rainbow
- Sub parhelion
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- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
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.
Summer sunset over Rumwell, Somerset, England
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Cirrus over Madison, Wisconsin, US
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Cumulus congestus propagating over Arlington, Virginia, US
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"Someone was painting the sky while I watched," as Anabelle described, when she viewed this skyscape over Exeter, Devon, England
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Mammatus (Mamma) over Mantua, New Jersey, US
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Signs of asperitas over North Brunswick, New Jersey, US
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A developing storm over Kirkkonummi, Finland
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A developing storm at sunset over Brighton, Colorado, US
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A mosaic of cirrus spissatus over the Bayview Golf Club, Sydney, Australia
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Cumulus fractus amidst the blue sky over Hercules, California, US
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Noctilucent appearing before and after Midnight over Vilnius, Lithuania
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A goose looking upwards in the expanse between the clouds, spotted over Brooktrails, California, US
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A developing storm over Woodbridge, Virginia, US
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Virga over Luxembourg City, Luxembourg
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Mammatus (Mamma) over Kottayam, Kerala, India
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