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Main Cloud Types
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Other Clouds
- Arcus
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- Cap / banner clouds
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- Cavum (Fallstreak hole)
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- Duplicatus
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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
- Undulatus
- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
- Green flash
- Glory
- Halos
- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- Moonbow
- Moondogs
- Parhelic circle
- Parry antisolar arcs
- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
- Sub parhelion
- Sub-sun
- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
Undulatus spotted over Conwy, North Wales
A plethora of Altocumulus lenticularis spotted over Helena, Montana, US
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Altocumulus lenticularis spotted over Momochihama, Fukuoka City, Japan
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Undulatus spotted at sunset over Torrejón de Ardoz, Spain
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A mixed sky over Hocksauerlandkreis, North Rhine-Westphalia, Germany
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Altocumulus lenticularis spotted over Khomeynishahr City, Esfahan, Iran
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Altocumulus undulatus spotted over Pietracorbara, Cap Corse, France
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Blairgowrie, Perthshire, Scotland
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A mixed sky with signs of a Circumhorizon Arc, spotted over Bushy Park, London, England
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Asperitas spotted over Pullman, Washington, US
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Asperitas spotted over Hohnstein, Saxony, Germany
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Asperitas and signs of lacunosus spotted over Dartmoor, Devon, England
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Altocumulus lenticularis spotted over Rothiemurchus, Scotland
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Asperitas and signs of lacunosus spotted over Marion, Iowa, US
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Altocumulus lenticularis with signs of lacunosus, spotted over the Chiricahua Mountains, near the Southwestern Research Station, Portal, Arizona, US
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Asperitas spotted over Somerset, England
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