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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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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
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- 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 sunset over Lake Superior, Michigan, US.
A vivid 22-degree halo spotted around mid-day over Singapore
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Remnants of contrails spotted over Orchard Park, New York, US
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Altocumulus lenticularis spotted at sunrise over the Flatirons, south of Boulder, Colorado, US
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Signs of virga during sunset over Longmont, Colorado, US
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Iridescence by way of a layer of cirrostratus, with nearby cirrocumulus undulatus, spotted over Sumirago, Varese, Italy
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Signs of asperitas spotted over Frywald, Poland
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Cumulus congestus spotted over National Taipei University, New Taipei City, Taiwan
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Crepuscular rays and shadows over Taipei, Taiwan
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Following a day of cloud cover, the evening sky opened up to a tranquil view of pastel colours over North Devon, England
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A primary and secondary rainbow that includes Alexander's Dark Band, an area that appears dark because the raindrops in that region are refracting sunlight at angles that do not direct any light toward the observer, as seen here over Sittingbourne, Kent, England
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Circumhorizon Arc spotted during a hike in the Norwegian fjords, near Åndalsnes, Norway
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Signs of lacunosus at night, spotted over West Jordan, Utah, US
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A rainy day that presented itself with a 'bridge', spotted over Brean, Somerset, England
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A 'pink dragon' in the sky over São Paulo City, Brazil
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A subtle sun pillar at sunset over Royal Deeside, Aberdeenshire, Scotland
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