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Main Cloud Types
- Cumulus
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Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
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- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
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- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
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- Intortus
- Lacunosus
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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
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- Noctilucent
- Pannus
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- Pileus
- Praecipitatio
- Radiatus
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- Spissatus
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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
Altocumulus lenticularis spotted on the western edge of Los Alamos, New Mexico, US
Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted by Rachel's husband over Scunthorpe, Lincolnshire, England
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted in a raspberry colour over Medford, Massachusetts, US
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Circumzenithal Arc spotted over Amenia, New York, US
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Altocumulus perlucidus spotted over Taiwan
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Croatia
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Mount Shasta, California, US
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Burton on Trent, England
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A mesmerizing view of altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Rossford, Ohio, US
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A reflection of altocumulus lenticularis in a pool during sunset, spotted near the Ottawa River, Luskville, Québec, Canada
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Anti-crepuscular rays spotted looking east at sunset, over Brighton, Colorado, US
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A unique juxtaposition of lacunosus with a vivid display of the Northern Lights (Aurora Borealis), spotted over Southern Alberta, Canada
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A larger fallstreak hole (cavum) accompanied by a smaller one, spotted over Arlington, Washington, US
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Altocumulus lenticularis spotted during sunrise over Vermontville, Adirondacks, New York, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Santa Fe, New Mexico, US
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Fallstreak Hole (Cavum) spotted over Conwy, North Wales
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