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Main Cloud Types
- Cumulus
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- Altostratus
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- 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
Enjoying the view of the variety of clouds while kayaking on Lake Placid, New York, US
Crows flying beneath cirrus clouds over Seattle, Washington, US
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While cloud spotting at the local airport, Nancy was reminded of a feather with this particular formation over Corvallis, Oregon, US
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A soaring bird in the morning sky over Santa Rosa, California, US
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A morning view of cumulus, spotted from 30,000 feet above eastern Washington, US
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A mixed sky at sunset, as seen from 36,000 feet above the ground, on a flight that was traversing across southern Japan
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Looking west over the Pacific Ocean, cirrus uncinus and cirrocumulus undulatus are spotted near Yachats, Oregon, US
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A train of cumulus clouds, puffing along the Northumberland Strait, viewed from Maximeville in the Evangeline region of Prince Edward Island, Canada
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A reflection of the clouds shortly after sunrise over Meinohama Fishing Port, Fukuoka City, Japan
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Cirrus over Malmesbury, Wiltshire, England
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Upper level winds creatively reshaping contrails over Gaw Hill, Ormskirk, England
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Development of cirrus from what appears to be the remnants of contrails, spotted over Farnham, England
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Cirrus over Baltimore, Maryland, US
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Cirrus uncinus spotted over Westbury-sub-Mendip, Somerset, England
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Remnants of a contrail over Whaletown, British Columbia, Canada
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A mixed sky accompanied by virga near the time of sunset, spotted over Sacramento, California, US
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