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Main Cloud Types
- Cumulus
- Stratus
- Stratocumulus
- Altocumulus
- Altostratus
- Cirrus
- Cirrocumulus
- Cirrostratus
- Nimbostratus
- 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
A sunset over the Gold Coast, Queensland, Australia.
Virga spotted over Hochsauerlandkreis, North Rhine-Westphalia, Germany
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Sunrise over Vermontville, Adirondacks, New York, US
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A view of low lying stratus in the valley, spotted by Bill's friend, Bill Buffie, from a funicular while traveling in Switzerland
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A mixed sky on a wintry afternoon near Cheddar Reservoir, Somerset, England
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Fluctus (Kelvin-Helmholtz) spotted over Isle of Harris, Scotland
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A fraction of a Circumzenithal Arc, with its 'upside-down' rainbow colours, visible via the confines of this cirrus cloud, spotted over Bayramiç, Çanakkale, Turkey
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Cumulus congestus taking on a look of a chick being hatched, spotted over Warsaw, Poland
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Altocumulus lenticularis spotted over Western Iran
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Reflections of the sky over Sacramento, California, US
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Fog along the Bieszczady Mountains, Poland
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Snow showers falling on Isle of Harris, Scotland
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Overcast near Ellesmere Port, Cheshire, England
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Sunset over Vermontville, Adirondacks, New York, US
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Following multiple weeks of rain, the blue sky was seen again over Blairgowrie, Perthshire, Scotland
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Circumzenithal Arc, also known as an 'upside-down rainbow', spotted by Richard's son, Graham Friedman, on a beautiful, calm day over Malibu, California, US
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