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Main Cloud Types
- Cumulus
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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
Cirrocumulus undulatus spotted over Conwy, North Wales
Crepuscular rays that emanate like a spotlight over Navarra, Spain
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Altocumulus spotted over Markazi Province, Iran
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Cumulonimbus spotted during an evening walk at sunset, near Fishers, Indiana, US
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Sunrise over the Missouri River near Wolf Creek, Montana, US
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A mesmerizing sunrise over the Atlantic Ocean, viewed near Boca Raton, Florida, US
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Crepuscular rays spotted over Khomeynishahr City, Esfahan Province, Iran
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Crepuscular shadows spotted during the monsoon season near Tucson, Arizona, US
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Altocumulus lenticularis at sunset over Torrejón de Ardoz, Spain
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Crepuscular rays during sunset over Sumirago, Varese, Italy
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Sun Dogs (Parhelia) and a Circumzenithal Arc spotted over the Stockholm Archipelago, Sweden
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Altocumulus stratiformis and low lying fog spotted at sunrise over Baskett Forest, near Ashland, Missouri, US
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Sunrise over Marinatown Seaside Park, Fukuoka City, Japan
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Sunset over Lisboa, Portugal
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Signs of virga spotted over Bestwig, North Rhine-Westphalia, Germany
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Altostratus spotted over Star, Idaho, US
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