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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 sea of Stratus in the moonlight over Campo dei Fiori, Varese, Italy.
A lower level of stratocumulus as seen from a flight, 10,000 feet above the Los Angeles Basin and Southern California, US
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Circumhorizon Arc, which is an optical effect that is caused by ice crystals in the sky acting as tiny prisms that refract and reflect the light, and it appears as a bright, flat band of colours parallel to the horizon. When cirrus clouds are present, they act as a canvas for the circumhorizon arc, causing it to become fragmented. This classic example was spotted over Rosenheim, Germany.
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Altocumulus over North Brunswick, New Jersey, US
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Sunrise over Estes Park, Colorado, US
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A vibrant sunset over Amsterdam, Netherlands
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A multi-dimensional Autumn sunset near Wolf Creek, Montana, US
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A weather station positioned well to monitor the conditions near Tainan, Taiwan
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A picturesque view of cumulus cloud formations near Mevagissey, Cornwall, England
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A variety of cloud formations at different levels of the atmosphere, around and above the Matterhorn, Zermatt, Switzerland
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Cirrus over Lochbuie, United States
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Sunset reflection over Lake Rakitje, Croatia
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Crepuscular rays and iridescence near Tainan City, Taiwan
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Cumulus congestus developing into a cumulonimbus over Semporna on the island of Borneo, Sabah State, Malaysia
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Cumulus fractus over Taipei, Taiwan
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Asperitas with lacunosus over Montevergine, Mercogliano, Italy
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