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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
Westerly winds sweeping over the crest of the Sierra Mountains created long strings of lenticular clouds that developed into a formation known as a "wave cloud", accompanied by iridescence along the edges. This unique sight was spotted over the Sweetwater Mountains in the eastern Sierra Nevada Mountain Range, California, US.
A nighttime view of passing cumulus over Palma de Mallorca, Spain
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Altocumulus undulatus radiatus spotted by Lucien's friend, Matt Bennett, over Gold Coast, Australia
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Asperitas in front of an approaching storm near Sumirago, Varese, Italy
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Looking west from the lower Port Hills with a view of crepuscular rays during sunset over the Southern Alps, near Christchurch, New Zealand
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Crepuscular rays and shadows over Chandler, Arizona, US
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Sunset over Vermontville, Adirondacks, New York, US
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A skylight of the Weatherspoon Art Museum at the University of North Carolina - Greensboro providing a view of altocumulus perlucidus over Greensboro, North Carolina, US
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Virga, along with unrelated signs of fluctus, amidst a colourful sky over Birmingham, England
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A developing storm over the Atlantic Ocean, spotted from Kitty Hawk, North Carolina, US
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A family of geese paddle their way across the calm water during sunrise over Sooke Basin, Sooke, Vancouver Island, British Columbia, Canada
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A juxtaposition that inspired Rodney to call it a cloud and its shadow, spotted over Hampshire, England
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Altocumulus undulatus radiatus spotted over West End, Brisbane, Australia
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A storm system near Chesterfield, England
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Altocumulus undulatus radiatus spotted over Taringa, Queensland, Australia
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A dissipating incus associated with a prior storm, spotted from above the clouds on a flight from Gatwick, approaching Jersey Airport, Saint Peter, Channel Islands, UK
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