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Main Cloud Types
- Cumulus
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- Altostratus
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- Cirrocumulus
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- 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 view from above, looking out at clouds of a cumulus origin, in various stages of growth and development, near Shenzhen, China
A dynamic view of undulatus and mammatus, ushering in the arrival of a front along the Oregon Coast, near China Creek Beach, Bandon, Oregon, US
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Cumulonimbus near North Dundas Township, Ontario, Canada
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A classic example of asperitas spotted over the Black Mountains, Western North Carolina, US
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A reflection of a sun pillar near Lough Ramor, Virginia, County, Cavan, Ireland
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A classic example of virga spotted over Kingscliff, Australia
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A view of the sunset from above the clouds, on a flight that departed from Narita International Airport, Japan, headed for Taoyuan International Airport, Taiwan
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A mixed sky at sunset, as seen looking east over the Sangre de Cristo Mountains near Santa Fe, New Mexico, US
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An incoming storm near Somerset, England
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After rain that had fallen in the morning, Junichi saw in the clearing skies of the afternoon a cloud that looked like a falling meteorite, during sunset over Aratsu, Fukuoka City, Japan
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Cumulus drifting over the Washington Monument in Washington D.C., US
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A circular contrail route over The Lizard, Cornwall, England
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A classic example of an altocumulus lenticularis, along with a second, nearly identical one in the background, spotted over Montana, US
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A mosaic of cirrus clouds over El Dorado County, California, US
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A storm that produced strong winds near Tremosine, Lake Garda, Italy
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A vibrant sky over Henningsvaer, Norway
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