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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
A thunderstorm captured at night, with lightning highlighting what appears to be an Altocumulus lenticularis in the midst of the storm system, spotted near Waterford, Wisconsin, US
Circumhorizon Arc spotted over Lewiston, Maine, US
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Crepuscular rays with strips of Cirrus high in the sky, spotted near Boca Raton, Florida, US
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Reflections of virga spotted in the early morning over Stornoway, Isle of Lewis, Scotland
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A dynamic sky presented itself over Top of Parlick, Chipping, Lancashire, England
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Altocumulus lenticularis spotted over Winthrop, Washington, US
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A colourful depiction of Altocumulus stratiformis spotted during sunrise over Penally, Pembrokeshire, Wales
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Cirrus spissatus spotted over Berrow Beach, Somerset, England
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Signs of Mammatus (Mamma) associated with a storm system at sunset, spotted near Catania, Sicily, Italy
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A storm system with Mammatus (Mamma) spotted at sunset from the Bonnie View Nature Sanctuary, Columbia, Missouri, US
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Cirrus fibratus spotted over the Hudson River, New York, US
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A classic example of Mammatus (Mamma) spotted over Pedara, a village located on the southern slopes of Mount Etna in Sicily, Italy
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Remnants of a late afternoon pillow fight, as Steven describes, spotted over Denver, Colorado, US
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Altocumulus floccus over Jacarezinho, Paraná, Brazil
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A mirror image captured near Stromness, Orkney, Scotland
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A dissipating storm with virga, spotted over Point, Isle of Lewis, Scotland
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