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Main Cloud Types
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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
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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
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- Noctilucent
- Pannus
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- 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
The influence of ashes in the sky from recent eruptions of Mount Etna, spotted over Catania, Italy
Cirrostratus over Kirkkonummi, Finland
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Cirrocumulus undulatus spotted over Conwy, North Wales
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A portrait of an alligator spotted following a morning storm near Fishers, Indiana, US
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Cirrostratus spotted during the afternoon over São Paulo City, Brazil
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A swirl of Cirrus spotted over Lake Whatcom, Bellingham, Washington, US
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A wild dancing figure gracing the early evening sky over North Dundas Township, Ontario, Canada
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Cirrostratus spotted over Evesham, England
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A mesmerizing sunrise over the Atlantic Ocean, viewed near Boca Raton, Florida, US
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Cirrus spotted over Momochihama, Fukuoka City, Japan
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A contrail and its shadow spotted over Dunedin, Aotearoa, New Zealand
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Crepuscular rays during sunset over Sumirago, Varese, Italy
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Sun Dogs (Parhelia) and a Circumzenithal Arc spotted over the Stockholm Archipelago, Sweden
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Signs of a distrail spotted over Arnhem, The Netherlands
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A colourful sunset over Star, Idaho, US
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Signs of a corona spotted over Llandudno, North Wales
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