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Main Cloud Types
- Cumulus
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Other Clouds
- Arcus
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- Cap / banner clouds
- Capillatus
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- Cataractagenitus
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- Cavum (Fallstreak hole)
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- Morning Glory Cloud
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- Mediocris
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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
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- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
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- Moonbow
- Moondogs
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- 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
Asperitas over Winnipeg, Manitoba, Canada
Shreds of pannus, also known as scud clouds, can take on different shapes and sizes, and usually exists within the saturated environment beneath a storm. This example was spotted over Cotia, São Paulo, Brazil
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Mamma (Mammatus) over Mercogliano, Italy
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Vivid display of asperitas and lacunosus as a storm approached Ottawa, Canada
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Asperitas that preceded a thunderstorm over Almonte, Ontario, Canada
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A large storm system that developed partly from the weak remnants of a Pacific Basin hurricane, spotted over the mountains in western Texas, US
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Multiple lightning strikes over Bluff, Utah, US
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Mamma (Mammatus) over Summonte, Italy
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Supernumerary bows, which consist of tiny fringes inside the primary bow, along with a subtle secondary bow, spotted near Zeebrugge, Belgium
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Waterspout near Pointe du Conguel, Quiberon, Brittany, France
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Mamma (Mammatus) spotted over Bedford, England
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Mamma (Mammatus) over the Big Bend Region of Southwest Texas, US
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Mamma (Mammatus) over Arak, Markazi, Iran
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Volutus (Roll Cloud) associated with a storm system that produced heavy rain, as spotted by Anuja's nephew, Akshay Shankar, over Bangalore, India
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Mamma (Mammatus) tend to form on the underside of an incus associated with a cumulonimbus storm cloud. However, mamma cloud formations can occur on a range of cloud types, albeit usually following the passage of a storm. This example was spotted near Boca Raton, Florida, US.
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Lightening over Bluff, Utah, US
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