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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
Further proof that Cirrus grows on trees, spotted over Napa, California, US.
Stratocumulus spotted over the Murray River, near Mannum, Adelaide, South Australia, Australia
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Mamma spotted over Barrea, L'Aquila, Italy
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A morning view of Altocumulus floccus and undulatus, spotted over Athens, Georgia, US
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Cirrocumulus undulatus spotted over Conwy, North Wales
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A busy sky with numerous contrails and passing Cumulus, spotted near Boca Raton, Florida, US
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A portrait of an alligator spotted following a morning storm near Fishers, Indiana, US
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Signs of virga amidst a scenic sky over Birmingham, England
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An abundant display of Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Great Asby, Cumbria, England
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An arcus, indicating the leading edge of a thunderstorm, spotted near Holly Springs, North Carolina, US
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Altocumulus spotted over Conwy, North Wales
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Crepuscular rays that emanate like a spotlight over Navarra, Spain
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Altocumulus undulatus resembling fingers waving from the sky, spotted over Goodyear, Arizona, US
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Cumulonimbus illuminated by lightning and reflected in Stony Lake, Ontario, Canada
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Cumulus over Winthrop, Washington, US
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A plethora of Cumulus clouds spotted from the rooftop of Marinoa City, Fukuoka City, Japan
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