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Main Cloud Types
- Cumulus
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- 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 translucent layer of Altocumulus providing a mesmerizing view during sunset over the Northeast Canadian High Arctic
Sunset over Arlington, Virginia, US
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Undulatus that Robyn thought looked like veins of a leaf, spotted over Goodyear, Arizona, US
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Berkshire, England
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Altocumulus lenticularis spotted over Marbella, Spain
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Iridescence spotted over The Villages, Florida, US
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Undulatus spotted at sunrise over Peoria, Arizona, US
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Parhelic Circle amidst the optical phenomena spotted over New York City, New York, US
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Signs of supercilium that Yuyang thought resembled migrating birds, spotted over Dalian, Liaoning Province, China
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Dynamic iridescence spotted at sunrise over Brighton, Colorado, US
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Reflections across the Menai Strait, North Wales
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Undulatus spotted over Markham, Ontario, Canada
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Strong upper level winds leading to the dispersal of this Cirrus cloud and the appearance of a large feather in the sky, which may have had its origins in a contrail or two, spotted over Kelseyville, Lake County, California, US
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Altocumulus straitformis undulatus spotted over Lizard Point, Cornwall, England
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Sunrise after a snowstorm in Toronto, Ontario, Canada
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Undulatus at sunset over Gaw Hill, Ormskirk, England
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