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Main Cloud Types
- Cumulus
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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
Sunrise from Cadillac Mountain, the first place where the sun's rays hit the United States during the summer months, is located in Acadia National Park, Maine, US.
Altocumulus undulatus at sunset over Denver, Colorado, US
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A dissipating storm near Milan, Italy
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Stratocumulus undulatus over Buonconsiglio Castle, Trento, Italy
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Layers of clouds at sunrise on an early morning flight from Venice, Italy, to Munch, Germany.
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In between layers of clouds in the sky, as viewed from a flight departing from Washington D.C., US
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Cirrus fills the sky over Denver, Colorado, US
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Stratus fractus hugging the mountainside over Lake Brienz, Switzerland
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Fog that formed along the winding river, as viewed from above, on a flight into Zurich, Switzerland
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A variety of cloud formations at different levels of the atmosphere, around and above the Matterhorn, Zermatt, Switzerland
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Cumulus congestus with precipitation reaching the ground over a ranch in New Raymer, Colorado, US
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Cirrus spissatus over Trajan's Kiosk (Pharaoh's Bed), Agilkia Island, Egypt
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Anti-crepuscular rays can sometimes be viewed when looking opposite of the setting sun, as they appear when tall clouds in front of the rising or setting sun cast long shadows across the sky, which can be seen receding off into the distance when facing away from the Sun. This classic example was spotted over Scottsbluff, Nebraska, US.
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Anti-crepuscular rays accentuated by a partial rainbow, spotted near Scottsbluff, Nebraska, US
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Altocumulus stratiformis coupled with Iridescence, along with Cumulus clouds closer to the ground, spotted over Central France
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A layer of Stratus fractus forms over the water and near land in Southern Greenland
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