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Main Cloud Types
- Cumulus
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- Cirrocumulus
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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
- 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
On the way down from Sugar Loaf Mountain, Maxine watched the rain head towards her along the Usk Valley, near Abergavenny, Wales
Altocumulus lenticularis spotted over West Loch Tarbert, South Knapdale, Argyll, Scotland
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Altocumulus lenticularis duplicatus spotted over Greenfield, California, US
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A late morning view of Cumulus congestus over Madison, Wisconsin, US
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A stormy sky over the River Thames, London, England
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Santiago, Chile
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Cirrus spissatus over Taipei City, Taiwan
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Stratocumulus undulatus spotted over Jiangsu, China
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A figure in the sky resembling a sea turtle, watching the shore during nesting season, spotted over Boca Raton, Florida, US
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Crepuscular rays spotted after a rainy day in central Indiana, US
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A pre-dawn view two hours prior to sunrise, with the comet Pan/STARRS visible near the horizon, spotted over the Glen Canyon Recreation Area, Utah, US
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Sunrise over Oakland, California, US
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Sacramento, California, US
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A vivid corona spotted over Brighton, Colorado, US
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Altocumulus perlucidus spotted over Duncans Mills, California, US
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Altocumulus lenticularis spotted over Sant Joan de les Abadesses, Girona, Spain
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