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
A mesmerizing view of altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Rossford, Ohio, US
Looking towards the east at sunset, these anti-crepuscular rays were spotted over Dallas, Texas, US
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Anti-crepuscular rays spotted looking east at sunset, over Brighton, Colorado, US
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Crepuscular rays spotted over Jeollanam-do, South Korea
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Anti-crepuscular rays, an optical phenomena caused by shadows cast by clouds or other objects, illuminated by sunlight, as spotted here when Joan was standing and facing east at sunset, with her back to the west, near San Diego, California, US
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Crepuscular rays prior to an approaching storm over Mercogliano, Italy
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Crepuscular rays and shadows during sunset over Isle of Lewis, Scotland
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Crepuscular rays and shadows during sunset over Brown County, Minnesota, US
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Crepuscular rays emanating from behind a developing storm near Trentino Alto Adige, Peio, Italy
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Mammatus (Mamma) at sunset over Oro Valley, Arizona, US
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Crepuscular rays over Khomeynishahr City, Esfahan, Iran
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Crepuscular rays over Hamburg, Germany
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Crepuscular rays over Canberra, Australia
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Crepuscular rays over Zagreb, Croatia
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Crepuscular rays over Esfahan, Iran
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Crepuscular rays shining through rising fog, spotted near Eugene, Oregon, US
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