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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
Amidst the clouds, Robyn spotted a tiny eye looking down with an eyebrow raised, over Estrella Foothills, Arizona, US
An opening in the layer of Stratocumulus over Newcastle, New South Wales, Australia
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Signs of Fluctus (Kelvin-Helmholtz) spotted from Gaw Hill, Ormskirk, England
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Sunset over Dalmatia, Croatia
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Stratocumulus spotted over Sun City, Georgetown, Texas, US
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A view from in between cloud layers, near New Taipei City, Taiwan
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Stratocumulus spotted over Taiwan
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Sunrise over San Leandro, California, US
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A colourful sky over Kaohsiung, Taiwan
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A contrast in the sky during sunrise over Woodland Hills, California, US
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Stratocumulus spotted over Taiwan
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Asperitas spotted over East Texas Regional Airport, Longview, Texas, US
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Virga spotted over Vermontville, Adirondacks, New York, US
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Reflections of the sky over Sacramento, California, US
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Overcast near Ellesmere Port, Cheshire, England
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A mixed sky at sunset over Middlesex, New York, US
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