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Main Cloud Types
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Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
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- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
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- Contrail (homogenitus)
- Duplicatus
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- Floccus
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- Fractus
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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
22-degree halo over Northern California, US
Sun Dog (Parhelion) spotted over West Yorkshire, England
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Asperitas following a storm over Bismarck, North Dakota, US
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Virga spotted during the early morning over Goodyear, Arizona, US
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In sharply defined rainbows, a set of narrow coloured bands can often be found repeating on the inside of the primary bow. Called supernumerary bows, they add an extra-special dimension to the display and are produced by diffraction as light waves cross each other exiting the raindrops, as seen here over Amsterdam, Netherlands.
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Virga spotted over Torrejon de Ardoz, Spain
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Mammatus (Mamma) following a storm over Wilson, Wyoming, US
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A storm system with mammatus (mamma) approaching Saltcoats, North Ayrshire, Scotland
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Altocumulus lenticularis spotted near Combe Hay, Bath, England
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Noctilucent spotted at approximately 3:00 AM local time over Rechitsa, Belarus
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Noctilucent appearing before and after Midnight over Vilnius, Lithuania
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A classic fallstreak hole (cavum) over Blyth South Beach, England
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Altocumulus lenticularis over Taipei, Taiwan
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Horseshoe vortex spotted over Leuven, Belgium
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A plethora of cirrocumulus over North Devon, England
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Fluctus (Kelvin-Helmholtz) spotted over Seattle, Washington, US
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