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Main Cloud Types
- Cumulus
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- Stratocumulus
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- 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 mixed sky in the early evening spotted prior to the arrival of a storm, near Prescott, Arizona, US
Crepuscular rays made a brief appearance during sunset over Liverpool Bay, viewed from Gaw Hill, England
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An elusive winter rainbow spotted over Waterton Lakes National Park, Alberta, Canada
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In between layers of clouds, a view from above during a flight, spotted between Porto Alegre and Curitiba, Brazil
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Sunset over Vermontville, Adirondacks, New York, US
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Iridescence spotted over Twisp, Washington, US
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Moon rising over low level stratus near Albany, California, US
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A mixed sky over Pietracorbara, Corsica, France
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Sunrise over Mt. Rainier, viewed from Westside, Olympia, Washington, US
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Fallstreak Hole (Cavum) spotted over Conwy, North Wales
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Cloud Streets spotted on a cold morning, overlooking a foggy Saranac River Valley with stratus enveloping the tops of Esther and Whiteface Mountains, near Vermontville, Adirondacks, New York, US
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A September sunrise during monsoon season near Taos, New Mexico, US
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A 'crack' within the layer of stratus, with a view into the evening sky over Helvoirt, The Netherlands
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While driving over the Bay Bridge with a few friends to go see the film 'Vertigo', which was filmed in San Francisco by Alfred Hitchcock in 1957, Reven conveyed that the clouds seemed to do battle amidst the skyscrapers, foreshadowing the vertiginous cinematic treat to come. This view was spotted from the Bay Bridge, San Francisco, California, US.
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A myriad of colors spotted over Yeongam-gun, South Jeolla Province, South Korea
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Stratus that Steven observed as appearing to be a nice, soft, inviting hammock draped between the shore cliffs, spotted in Southwest Greenland
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