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Other Clouds
- Arcus
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- Cap / banner clouds
- Capillatus
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- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
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- Duplicatus
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- Mediocris
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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 vibrant display of Cirrus unicnus, which in Latin means "curly hooks". This type of high-level cloud is also known as mares' tails, as spotted here over South Portland, Maine, US.
Sunset over Todd's Island on Spednic Lake, New Brunswick, Canada
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Sunrise near Port Richey, Florida, US
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A cloudbow as seen from above, by way of an airplane that took off from Curitiba, Brazil
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A storm system within which Roger noticed a shape of a boar, spotted over Gorse Hill, Ormskirk, England
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An expansive view of cumulus congestus spotted by Steven Granberg over Albuquerque, New Mexico, US
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A small dark cloud that looks like a small fish in a big pond, amidst a storm on the horizon, near Isle of Lewis, Scotland
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The illusion of floating rocks in the water, which appears to "merge" with the sky over Grand Traverse Bay, Michigan, US
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Altocumulus with some apparent virga in the distance, spotted near Kianga Beach, New South Wales, Australia
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Altocumulus stratiformis spotted over São Paulo City, Brazil
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Crepuscular rays and shadows at sunset over the Isle of Lewis, Scotland
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A primary and secondary rainbow spotted late in the day over Northern California, US
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Crepuscular rays emanating through cumulus clouds at the edge of a storm system near Denver, Colorado, US
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Cirrus uncinus over the Adriatic Sea, near San Cataldo, Lecce, Italy
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A corona over North Dundas Township, Ontario, Canada
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A storm system near Erm, Netherlands
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