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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 storm system with mamma over Phoenix, Arizona, US.
Signs of asperitas over North Brunswick, New Jersey, US
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A developing storm over Kirkkonummi, Finland
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A developing storm at sunset over Brighton, Colorado, US
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A mosaic of cirrus spissatus over the Bayview Golf Club, Sydney, Australia
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Cumulus fractus amidst the blue sky over Hercules, California, US
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Noctilucent appearing before and after Midnight over Vilnius, Lithuania
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A goose looking upwards in the expanse between the clouds, spotted over Brooktrails, California, US
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A developing storm over Woodbridge, Virginia, US
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Virga over Luxembourg City, Luxembourg
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Mammatus (Mamma) over Kottayam, Kerala, India
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Sunset over Nagano Station, Japan
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Cirrus cloud formations from homogenitus via prior contrails, which Dan spotted when he was on his way to a Green Bay Packers football game earlier this year, as he travelled through Madison, Wisconsin, US
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A plane seemingly headed towards a storm over Cary, North Carolina, US
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Undulatus at sunrise over Northern California, US
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Sunset over Momochi Seaside Park, Fukuoka City, Japan
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