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Main Cloud Types
- Cumulus
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- Cirrocumulus
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- Cumulonimbus
Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
- Diamond dust
- Distrail
- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- Intortus
- Lacunosus
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- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
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- Noctilucent
- Pannus
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- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
- Spissatus
- Stratiformis
- '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
Sunset on a summer evening near Taylor, Texas, US
A "whale" cloud borne out of a contrail, breeches above the trees, as spotted over Ravenna, Seattle, Washington, US
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The view shortly after take-off from Dulles Airport, Virginia, US
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Fluctus (Kelvin-Helmholtz) resembling the waves below, spotted near Tofino, British Columbia, Canada
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Remnants of contrails (homogenitus) over Krzeszowice, Poland
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Circumhorizon Arc spotted over Maissin, Belgian Ardennes, Belgium
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Sun Dog (Parhelion) spotted over Crank, St. Helens, Merseyside, England
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Contrails (Homogenitus) over Seaburn, Sunderland, England
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Cirrus cloud formation from what appears to be a prior contrail, spotted over Lake Stevens, Washington, US
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Given the visual perspective of the cumulus clouds, it seemed as if they were zooming quickly towards Helen when she spotted them over Somerset, England
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A contrail traversing the sky over Kraków, Poland
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The breakdown of a contrail, spotted over Great Crag, Watendlath, English Lake District, England
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Cumulus over Twisp, Washington, US
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"Someone was painting the sky while I watched," as Anabelle described, when she viewed this skyscape over Exeter, Devon, England
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Cirrus cloud formations from homogenitus via prior contrails, which Dan spotted when he was on his way to a Green Bay Packers football game earlier this year, as he travelled through Madison, Wisconsin, US
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Horseshoe vortex spotted over Leuven, Belgium
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