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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
Full moon illuminating altocumulus a couple of hours after sunset, spotted over Madison, Wisconsin, US
Crepuscular rays over Iligan City, Philippines
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Altocumulus lenticularis spotted over Omak, Washington, US
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Mammatus (Mamma) that preceded rainfall over Daventry, Northamptonshire, England
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Contrails in the distance over Lowestoft, England
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Swirls of clouds spotted over San Francisco Bay, California, US
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Altocumulus over Mechanicsburg, Pennsylvania, US
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A matching scene between the sky and land, spotted over the mountains of Canfranc, Huesca, Spain
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Sunset over Buenos Aires, Argentina
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Spotted by Peter's friend, a multitude of clouds over Papar, Sabah, Malaysia
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A sky filled with patterns and colours over Mengelrode, Germany
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A mixed sky over Dover, Delaware, US
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A misty Autumn morning near Crank, St Helens, Merseyside, England
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Fallstreak Hole (Cavum) spotted over Anduze, France
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Crepuscular rays over Sanxia, New Taipei City, Taiwan
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22-degree halo spotted near Devils Tower National Monument, Wyoming, US
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