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Main Cloud Types
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- Altostratus
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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
- Lenticularis
- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
- Nebulosus
- Noctilucent
- Pannus
- Perlucidus
- 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
An asperitas formation over the central coast of Oregon, US.
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A storm system with an "explosion of clouds and colour", as Ruth described, spotted facing north with the Mission Mountain Range to the right, near Charlo, Montana, US
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A cloud "flower" over the Salish Sea, spotted from Helliwell Provincial Park, Hornby Island, British Columbia, Canada
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A surfer's view of an imposing storm on the horizon, spotted near Boca Raton, Florida, US
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A colourful display of what appears to be a circumhorizon arc, spotted over Newcastle, New South Wales, Australia
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Sunrise with altocumulus lenticularis and pileus over the Adirondack Mountains, near Vermontville, New York, US
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Sun Dog (Parhelion) spotted on a meaningful day for Janis, near El Dorado Hills, California, US
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Altocumulus undulatus over Arlington, Virginia, US
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Clouds emanating upward from the horizon, spotted over Pitman, New Jersey, US
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Sun Dog (Parhelion) intersecting with a contrail, spotted from the campus of ArtCenter College of Design, in Pasadena, California, US
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Cumulonimbus over La Rinconada, Spain
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A flock of birds under a canopy of clouds, spotted over Rome, Italy
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Reflections of cumulus over Northern California, US
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Cirrus uncinus moved into the region following record high temperatures in Adelaide, Australia
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