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Main Cloud Types
- Cumulus
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- 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
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- Intortus
- Lacunosus
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- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
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- 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
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
Sunset accompanied by a rainbow, spotted near Prestonpans, Scotland
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Orographic cumulus as a result of moist air being forced to rise over a mountain or hill, as spotted here near Paneveggio, Italy
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A vivid 22-degree halo spotted around mid-day over Singapore
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Cirrus uncinus which Anna says resembles their alphorn, spotted over Champfer, Engadin, Switzerland
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Crepuscular rays and shadows during sunset over Isle of Lewis, Scotland
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Horseshoe vortex spotted in the early evening over Hereford, Arizona, US
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Pileus, also known as a cap cloud, can develop above rapidly rising cumulus or cumulonimbus clouds, as spotted here by Genevieve's father during an evening walk in Minneapolis, Minnesota, US
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Mammatus (Mamma) at sunset over Oro Valley, Arizona, US
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A classic example of pileus spotted over Curitiba, Brazil
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A large version of altocumulus lenticularis spotted over Dupuyer, Glacier County, Montana, US
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Altocumulus lenticularis over Svalbard, Norway
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Virga spotted during the early morning over Goodyear, Arizona, US
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Virga spotted over Torrejon de Ardoz, Spain
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A storm system with mammatus (mamma) approaching Saltcoats, North Ayrshire, Scotland
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A classic fallstreak hole (cavum) over Blyth South Beach, England
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