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Main Cloud Types
- Cumulus
- Stratus
- Stratocumulus
- Altocumulus
- Altostratus
- Cirrus
- Cirrocumulus
- Cirrostratus
- Nimbostratus
- 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
- Lenticularis
- 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
A sunset over Kenton on sea, Eastern Cape, South Africa.
Cirrus and Altocumulus sharing the sky, spotted by Anuja's friend, Madhavi Surabhi, over the Twelve Apostles, Port Campbell National Park, Victoria, Australia
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A developing storm spotted over Santiago, Chile
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Cumulonimbus spotted near Girona, Spain
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Cumulus congestus spotted at sunrise over Yilan, Taiwan
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Stratocumulus with signs of iridescence and subtle crepuscular rays, spotted over Vuosaari, Finland
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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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