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
Crepuscular rays over New Taipei City, Taiwan
Circumzenithal Arc accompanied in the sky by altocumulus undulatus over Ahrenshoop, Germany
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Crepuscular rays emanating brightly from behind cumulus clouds over Mendip Hills, Somerset, England
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Crepuscular rays emanating over Lake Crescent, from beyond the Olympic Mountains near Port Angeles, Washington, US
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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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Crepuscular rays over the Lagoon of Venice, Italy
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Anti-crepuscular rays over ShenZhen, China
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Crepuscular rays emanating from behind a cumulus cloud over the Indian Ocean island nation of Mauritius in East Africa.
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Crepuscular rays and shadows at sunrise over the Adirondack Mountains in upstate New York, US.
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Crepuscular rays over Umbria, Italy.
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Anti-crepuscular rays over Cascavel, Paraná, Brazil.
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Crepuscular rays over Antioquia, Colombia.
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Crepuscular Rays over Toyohama, Fukuoka City, Japan.
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Crepuscular rays over North Cumbria, England,
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Anti crepuscular rays over Brighton, Colorado, US
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Rays at sunset over Monte Rosa, Piemonte, Italy.
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