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Main Cloud Types
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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
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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
The clouds undulate and radiate towards the horizon over Napa, California, US.
A layer of Altocumulus stratiformis spotted near Crank, Merseyside, England
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Undulatus spotted during an early morning walk in central Indiana, US
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Asperitas over Nave do Barao, Portugal
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Arcus delineating the leading edge of a storm system as it moves over Columbia, Missouri, US
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The colours of sunset near Winthrop, Washington, US
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Cirrocumulus undulatus with signs of lacunosus, spotted near Mt. Shasta, California, US
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Cirrostratus over Conwy, North Wales
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An airplane flying beneath Altocumulus, spotted over Taipei, Taiwan
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Altocumulus undulatus spotted while looking west in the late afternoon, near Modbury Heights, Adelaide, South Australia, Australia
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Altocumulus perlucidus spotted over Shulin District, New Taipei City, Taiwan
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A lone Altocumulus lenticularis in its simplest form spotted by Rhode's son, over Brooklyn, New York, US
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Altocumulus stratiformis spotted by Anuja's daughter-in-law, Nikitha Surabhi, over Port Louis, Mauritius
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Remnants of a contrail being dispersed by upper level winds over Halsham, East Riding of Yorkshire, England
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Cumulus congestus spotted over Sant Adrià de Besòs, Catalonia, Spain
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Signs of Altocumulus lenticularis spotted near Ji-an Township, Hualien, Taiwan
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