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Main Cloud Types
- Cumulus
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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
Sunset over Vermontville, Adirondacks, New York, US
A variety of altocumulus over Magnuson Park, Seattle, Washington, US
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A colourful sunset over Marinoa City, Fukuoka City, Japan
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Altocumulus floccus perlucidus spotted over Seattle, Washington, US
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Altocumulus floccus spotted over King Street Station, Seattle, Washington, US
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Homogenitus via a prior contrail, which Robin described as 'strange and beautiful', spotted over Montclair, New Jersey, US
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A delicately painted sky at sunrise over Antelope Valley, California, US
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Altocumulus floccus creating layers of reflection by way of Round Lake, Idaho, US
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Altocumulus floccus over Elliot Bay, Seattle, Washington, US
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Puffs of white throughout the sky over Wimborne, Dorset, England
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Altocumulus floccus populating the sky over Northern California, US
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Altocumulus floccus amidst the blue sky over Hercules, California, US
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A plethora of cirrocumulus over North Devon, England
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Crepuscular rays amidst the altocumulus floccus, spotted over Ocean City, New Jersey, US
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Palm trees reaching upward towards the altocumulus clouds, spotted near Momochi Seaside Park, Fukuoka CIty, Japan
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A mosaic of clouds over Eastern Shore of Chesapeake Bay, Maryland, US
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