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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
An arcus, indicating the leading edge of a thunderstorm, spotted near Holly Springs, North Carolina, US
During an active thunderstorm, Kerstin's husband captured an illuminated Cumulonimbus during the frequent lightning strikes, spotted near Biesdorf, Berlin, Germany
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A storm system over Fuzhou City, FuJian Province, China
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Precipitation appearing to reach the ground in the distance, spotted near Deadhorse, North Slope, Alaska, US
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Lightning strike captured via 30-second exposure, spotted near Kingman, Arizona, US
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An advancing arcus, indicating the leading edge of a storm, spotted over Milano, Italy
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Cumulonimbus spotted near Kingman, Arizona, US
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Primary and secondary rainbows following the passage of a storm near Brighton, Colorado, US
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Rain showers near Torrejon de Ardoz, Spain
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An expansive view of a severe thunderstorm that produced large hail and heavy rain near Brighton, Colorado, US
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A stormy sky on a day when supercells were in the area near Haarlem, The Netherlands
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A frontal passage marked by an arcus, the leading edge of a thunderstorm, spotted over Boothbay Harbor, Maine, US
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Arcus, also known as a shelf cloud, indicating the leading edge of a thunderstorm, spotted over Guna, Madhya Pradesh, India
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A rain shaft spotted near Guna, Madhya Pradesh, India
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Precipitation falling over the North Sea, near Heligoland, Düne, Germany
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A storm system captured over Brighton, Colorado, US
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