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Main Cloud Types
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Other Clouds
- Arcus
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- Cap / banner clouds
- Capillatus
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- Cataractagenitus
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- Cavum (Fallstreak hole)
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- Duplicatus
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- Praecipitatio
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- '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
Cumulus along the horizon, spotted over Hakata Bay from the coast of Saitozaki, Fukuoka City, Japan
Cirrus vertebratus spotted over Dallas, Texas, US
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A clearing sky following rain near Greenfield, California, US
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A mosaic of clouds during sunset over Taylor, Texas, US
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A fraction of a Circumzenithal Arc, with its 'upside-down' rainbow colours, visible via the confines of this cirrus cloud, spotted over Bayramiç, Çanakkale, Turkey
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Circumzenithal Arc, also known as an 'upside-down rainbow', spotted by Richard's son, Graham Friedman, on a beautiful, calm day over Malibu, California, US
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Sunset over Marizon, Fukuoka City, Japan
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Cirrus radiatus over the Sonoran Desert, Southern Arizona, US
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Cirrus on display over Lake Stevens, Washington, US
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Cirrus uncinus spotted over Seattle, Washington, US
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Lacunosus spotted over Gent Sint-Amandsberg, Belgium
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Cirrus spotted over Slaley, near Hexham, Northumberland, England
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A display of Cirrus over Dehradun, India
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A flock of birds with a spotlight from the sky, observed during an ordinary moment, from a local supermarket parking lot in Medford, Massachusetts, US
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Cirrus fibratus spotted over Brisbane, Australia
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Remnants of contrails spotted over Tucson, Arizona, US
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