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Main Cloud Types
- Cumulus
- Stratus
- 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 morning view of Altocumulus floccus and undulatus, spotted over Athens, Georgia, US
Altocumulus spotted over Conwy, North Wales
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An expansive display of Altocumulus spotted over Heswall, Wirral, England
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Altocumulus perlucidus spotted over Cologne, Germany
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Signs of potential development of two Fallstreak Holes (Cavum) spotted from 38,000 feet, over Border Ranges National Park, on a flight from Brisbane to Sydney, Australia
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Altocumulus spotted over Blairgowrie, Perthshire, Scotland
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Altocumulus perlucidus spotted over Esfahan, Iran
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Altocumulus perlucidus spotted over Cambridge, England
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Altocumulus over Markazi Province, Iran
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Altocumulus spotted over Golden Hill, San Diego, California, US
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Signs of a fragmented corona spotted over Folsom, California, US
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A classic example of a Fallstreak Hole (Cavum) spotted over California, US
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A layer of Altocumulus spotted over Lee-Ming Institute of Technology, Xinbei, Taiwan
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A shadow of a contrail spotted over Somerton, Somerset, England
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Altocumulus perlucidus spotted over Little Berkhampstead, East Hertfordshire, England
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Sunset over Hyderabad, Telangana, India
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