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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 mixed sky at sunset over Middlesex, New York, US
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A colourful sunrise over Brighton, Colorado, US
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A portion of a rainbow, illuminated with the color spectrum, spotted over Willits, California, US
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Cumulus and Altocumulus sharing the sky over Mahajeran, Iran
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A contrail and a distrail, along with signs of a fallstreak hole (cavum), spotted over Falls Church, Virginia, US
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Rainbow spotted over Warsaw, Poland
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Cap Cloud spotted over Lord Howe Island, New South Wales, Australia
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Signs of developing Altocumulus lenticularis over Beinn Bhan, Applecross, Scotland
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Virga over the Northeast Canadian High Arctic
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Altostratus along the horizon, spotted near North Dundas Township, Ontario, Canada
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A contrail spotted shortly before sunrise over Madison, Wisconsin, US
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Stratus hugging the mountainside, with signs of an Altocumulus lenticularis developing off to the side of the range, spotted on the seaside of Fujian, China
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Altostratus provides the illusion that Mount Hood is erupting at sunrise, spotted from Vancouver, Washington, US
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Altocumulus lenticularis and undulatus spotted over Northwest Iran
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The clouds over the ocean were reflecting pink at sunset, spotted near Kianga, New South Wales, Australia
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