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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
Corona over Lochbuie, United States
Altocumulus lenticularis duplicatus spotted over the mountains, from the Missouri River near Wolf Creek, Montana, US
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Sun Pillar over El Paso, Texas, US
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Asperitas over Northern California, US
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On a walk, Monica described it as being wrapped in a startling smorgasbord of cloud beauty, near the San Francisco Bay, California, US
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A rainbow stretching across the sky over Coventry, England
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A varied and mixed sky over Sacramento, California, US
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Altocumulus lenticularis over Western Iran
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Multiple storms on the horizon near Dahouet, France
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The Yukon © George Preoteasa
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Glory over West Thumb, United States
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Fairweather Friend © Chris Tetley
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A layer of stratus settles in near the coastline of Marengo, Australia
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Lacunosus over Brooklyn, Wellington, New Zealand
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Lunar iridescence over Piesendorf, Austria
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Contrails on display near the Estrella Foothills, Arizona, US
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A sky filled with colour over Reutlingen, Germany
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Moon and Venus in conjunction at twilight, visible in the sky and accompanied by altocumulus in the foreground, spotted near Bluff, Utah, US
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Cumulus reflected in the puddle of water near Atagohama, Fukuoka City, Japan
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Mamma over Thirlmere, Australia
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Altocumulus lenticularis over a mountain range near the airport in Ljubljana, Slovenia
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Layers of overcast over Washington D.C., US
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As Reven walked along the beach at sunset, she looked up and wondered; "Is the sky looking down at me with rose colored glasses, or could it be vice versa?" Sunset over La Baie Longue, Les Terres Basses, Saint Martin.
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Iridescence yielding multiple colours over Brighton, Colorado, US
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Cirrus over Asal Mountain, near Lar, Larestan, Iran
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A plethora of altocumulus lenticularis near Gulfoss, Iceland
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Walking in the mountains, just below a low stratus layer, with crepuscular rays in the distance, looking south from the Sierra Nevada, Spain
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Crepuscular rays above the Shechen Monastery in Kathmandu, Nepal
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Crepuscular rays being seen above and below cumulus congestus at sunset near the airport on Grand Cayman of the Cayman Islands
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Cumulus humilis over London, England
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A primary rainbow and a faint secondary rainbow following a "Kona Low" winter storm near Hamakua Coast, Big Island, Hawaii, US
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A front moving in over Whiteface Mountain on a frigid, misty day near Vermontville, Adirondacks, New York, US
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Sunrise over Boca Raton, Florida, US
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A view from above, near Alencon, France
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Altocumulus over Alto, United States
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Iridescence over Northern California, US
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A developing cumulonimbus that Bob observed was capped with a black heart sitting in front of a silver heart, spotted on the Kapiti Coast, north of Wellington, New Zealand
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A circle of clouds in the sky over Lake Como, Italy
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Altocumulus lenticularis duplicatus spotted over the mountains, from the Missouri River near Wolf Creek, Montana, US
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Sun Pillar over El Paso, Texas, US
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Asperitas over Northern California, US
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On a walk, Monica described it as being wrapped in a startling smorgasbord of cloud beauty, near the San Francisco Bay, California, US
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A rainbow stretching across the sky over Coventry, England
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A varied and mixed sky over Sacramento, California, US
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Altocumulus lenticularis over Western Iran
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Multiple storms on the horizon near Dahouet, France
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Glory over West Thumb, United States
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A layer of stratus settles in near the coastline of Marengo, Australia
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Lacunosus over Brooklyn, Wellington, New Zealand
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Lunar iridescence over Piesendorf, Austria
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Contrails on display near the Estrella Foothills, Arizona, US
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A sky filled with colour over Reutlingen, Germany
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