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Main Cloud Types
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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
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- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
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- Intortus
- Lacunosus
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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
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- Noctilucent
- Pannus
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- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
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- 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
Storm system near Buckeye, Arizona, US
Altocumulus stratiformis over Undy, Monmouthshire, Wales
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Crepuscular rays making their way through a storm during the monsoon season in southeastern Utah, near Bluff, Utah, US
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Altocumulus stratiformis undulatus and a corona optical effect over Southsea, Hampshire, England
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Asperitas over Brecon, Powys, Wales
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Pileus over Denton, United Kingdom
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Asperitas near Sumirago, Varese, Italy
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Altocumulus with some Fluctus (Kelvin-Helmholtz) formations, spotted over Achim, Uesen, Germany
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Lacunosus, a Latin term meaning "full of gaps", represents a short-lived cloud formation that has holes present, resembling a honeycomb. This cloud formation was spotted over Lombard, Illinois, US.
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Noctilucent clouds over Hedekas, Sweden
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Cumulus congestus as seen from above the clouds, via this view of Monte Antelao from Monte Cernera, Dolomites, Italy
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Altocumulus stratiformis undulatus, also known as a mackerel sky, spotted in the midst of a stunning sunset over Cloncurry, Queensland, Australia
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Mamma (Mammatus) clouds following a thunderstorm over Kalken, Belgium
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Cumulonimbus over Lakeview, United States
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Cirrocumulus and Crepuscular rays over Gimpo, South Korea
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Lunar iridescence with a full moon, as captured by Cassie Eismann, near Excelsior Springs, Missouri, US
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