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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
- 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 evolving display of Cirrus spotted over Mulholland Drive, Los Angeles, California, US
A creature in the sky over Greenfield, California, US
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A storm system illuminated during sunrise over Plaquemine, Louisiana, US
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Great Falls, Montana, US
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Altocumulus undulatus spotted during sunset over Dereham, Norfolk, England
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A lone Cumulus drifts over Dalhousie University and University of King's College, Halifax, Nova Scotia, Canada
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Altocumulus spotted by Richard's son, Graham Friedman, while walking through the Pantanal, Mato Grosso do Sul, Brazil
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An approaching storm over Rijswijk, The Netherlands
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Sunset viewed from approximately 40,000 feet above Central Australia
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A frontal passage marked by an arcus, the leading edge of a thunderstorm, spotted over Boothbay Harbor, Maine, US
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A vast display of Altocumulus spotted near Mt. Shasta, California, US
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A storm accompanied by mammatus (mamma), spotted over North Dundas Township, Ontario, Canada
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An approaching storm near Douglasville, Georgia, US
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A contrail and its shadow, spotted over Arnhem, The Netherlands
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A developing storm over Innsbruck, Austria
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Arcus, also known as a shelf cloud, indicating the leading edge of a thunderstorm, spotted over Guna, Madhya Pradesh, India
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