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Main Cloud Types
- Cumulus
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- Cirrocumulus
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- Cumulonimbus
Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
- Diamond dust
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- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- 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
- Silvagenitus
- Spissatus
- Stratiformis
- '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
A dynamic sky with Cirrocumulus undulatus and vivid iridescence, spotted over Acadiana Regional Airport, New Iberia, Louisiana, US
Undulatus that Robyn thought looked like veins of a leaf, spotted over Goodyear, Arizona, US
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Dynamic iridescence spotted at sunrise over Brighton, Colorado, US
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Signs of supercilium and lacunosus spotted near Mercogliano, Italy
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Dense fog over the Salish Sea, with a myriad of clouds lit up by the setting sun, spotted while looking west towards Vancouver Island, from Sunshine Coast, British Columbia, Canada
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Mid-morning iridescence over Lebec, California, US
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Partial clearing following a morning storm near Falls Church, Virginia, US
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A view of the blue sky amidst the clouds, spotted on a windy day over Miaoli County, Taiwan
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Cirrocumulus with some limited signs of lacunosus, spotted over Taiwan
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A mixed sky over Dover, Delaware, US
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A set of trees reaching upwards towards the sky, with cirrocumulus undulates spotted over Somerset, England
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An intricate web of undulatus, accompanied by signs of lacunosus, spotted over Lake Stevens, Washington, US
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Cirrocumulus spotted over Anversa degli Abruzzi, Italy
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Remnants of what appears to be a form of lacunosus, spotted over Highlands, North Carolina, US
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A pink sky over Passirac, France
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Cirrocumulus with signs of lacunosus spotted over Bethany, Oklahoma City, Oklahoma, US
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