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Main Cloud Types
- Cumulus
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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
- Distrail
- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- Intortus
- Lacunosus
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- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
- Nebulosus
- Noctilucent
- Pannus
- Perlucidus
- 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
The Northern Lights over Blachford Lake, Northwest Territories, Canada.
Signs of asperitas and lacunosus spotted over Prairie Grove, Arkansas, US
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A 'large bird' settling down at sunset that reminded Allison of her own parrot, spotted over Mamaroneck's Harbor and Harbor Island Park in Mamaroneck, New York, US
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A feather spotted in the sky over Isle of Wight, England
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A dramatic display of Asperitas spotted over Olympia, Washington, US
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A lunar 22-degree halo spotted over Westbury sub Mendip, near Wells, Somerset, England
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A storm system over Jiangsu, China
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Virga spotted at sunset over Vermontville, Adirondacks, New York, US
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The passage of a storm system that produced a tornado in the area of Central Indiana, US
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Sunset over Sychnant Pass, Conwy, Wales
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A mixed sky in the evening, following the passage of a storm near Freeland, Michigan, US
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Cumulus congestus spotted over Dinuba, California, US
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Cirrostratus spotted over High Ham, Langport, Somerset, England
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A picturesque sunset with a trace of a Sun pillar, spotted over Sumirago, Varese, Italy
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Sunrise over Modbury Heights, Adelaide, South Australia, Australia
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A glory spotted below, along with the shadow of the plane, during a flight's descent over Helsinki, Finland
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