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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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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
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- Noctilucent
- Pannus
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- Pileus
- Praecipitatio
- Radiatus
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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
A primary and secondary rainbow that includes Alexander's Dark Band, an area that appears dark because the raindrops in that region are refracting sunlight at angles that do not direct any light toward the observer, as seen here over Sittingbourne, Kent, England
Circumhorizon Arc spotted during a hike in the Norwegian fjords, near Åndalsnes, Norway
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Signs of lacunosus at night, spotted over West Jordan, Utah, US
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A rainy day that presented itself with a 'bridge', spotted over Brean, Somerset, England
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A 'pink dragon' in the sky over São Paulo City, Brazil
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A subtle sun pillar at sunset over Royal Deeside, Aberdeenshire, Scotland
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Cumulus fractus over Esfahan, Iran
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A storm system over Applegate Valley, Oregon, US
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Altocumulus lenticularis spotted over L'Estartit, Catalonia, Spain
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Sunset over Hyde Park, New York, US
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A plane coming in for landing underneath a layer of stratocumulus, near Songshan Airport, Taipei, Taiwan
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Enjoying the view of the sky over calm waters, near the Hudson Riverfront in Dobbs Ferry, New York, US
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Reflecting on the concept of coincidence, James spotted these Cirrus 'horsetail' (mare's tail) clouds in the evening sky after he had spent several hours that day on horseback, traversing the hills and pastures adjacent to the Thompson River, Thompson-Nicola Valley, British Columbia, Canada
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A developing, robust storm near Antelope Valley, California, US
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A noteworthy storm approaching Tananger, Norway
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A myriad of clouds at sunset over Taylor, Texas, US
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