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Main Cloud Types
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Other Clouds
- Arcus
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- Cap / banner clouds
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- Cataractagenitus
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- Cavum (Fallstreak hole)
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- Flammagenitus (Pyrocumulus)
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- Fractus
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- Mediocris
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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
A classic example of mammatus (mamma) over Paris, France
An imposing storm which Lisa spotted from her boat, near Åland Islands, Finland
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A storm system approaches Huntington, Indiana, US
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An elongated version of altocumulus lenticularis spotted over Mammoth Lakes, California, US
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A view from above the clouds, over Lake Superior, Ontario, Canada
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A panoramic view of mammatus (mamma) over Lincoln, Nebraska, US
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On a cool evening, virga was spotted near the horizon over Twickenham, England
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The development of what appears to be an arcus, also known as a shelf cloud, marking the leading edge of a storm system near Lam Plai Mat, Thailand
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A storm system over Somerset, England
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Signs of storm development over Manzanita, Washington, US
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A bouquet of altocumulus spotted by Anuja's friend, Tanya Sinha, from an altitude of 2,900 metres in the Himalayas, near Kareri, Himachal Pradesh, India
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A giant fish was seen when Kate looked up at the sky over Hadfield, Derbyshire, England
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Cirrostratus undulatus, which Janet saw as resembling a herringbone, spotted during the evening near Tavistock, Devon, England
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With the sun rising behind Aldo Brando, the photographer, these anti-crepuscular rays were spotted. Anti-crepuscular rays 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, as was the case here, near Bogota, Colombia.
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A storm system near Gibsons, British Columbia, Canada
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Signs of fluctus (Kelvin-Helmholtz) spotted over Solihull, England
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