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Main Cloud Types
- Cumulus
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- Altostratus
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- Cirrocumulus
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- 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 mesmerizing sight of a 22-degree halo and sun dogs (parhelia) over Corvara, Italy
A merging of the clouds and the mountains near Menai Strait, Wales
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A unique juxtaposition of the sun and the clouds between Zagreb and Rijeka, Croatia
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Stratocumulus in the distance, spotted near Qom City, Iran
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A view of a full rainbow, along with a faint secondary bow, spotted near Crank, Merseyside, England
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Iridescence spotted over Mar, Cantabria, Spain
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Cumulus fractus drifting above a lower layer of clouds, spotted over Torrejón de Ardoz, Spain
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Altocumulus lenticularis duplicatus spotted over the Alps Mountains, near Wagrain, Austria
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Sunset over Dubai, United Arab Emirates
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Sunset with Altocumulus perlucidus over Modbury Heights, Adelaide, South Australia, Australia
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Crepuscular rays spotted at sunrise over the Atlantic Ocean, near Boca Raton, Florida, US
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Cumulus fractus spotted over Khomeynishahr City, Esfahan, Iran
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Cumulus and Altocumulus sharing the sky over Holden Hill, Adelaide, South Australia, Australia
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Crepuscular rays spotted over Funchal, Madeira, Portugal
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Following the passage of a storm, Monica had this view of a mixed sky during an evening walk, looking across the bay towards San Francisco, from Berkeley, California, US
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A view of the valley fog over Kerala, India
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