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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 vivid corona is spotted when the sun shines through a thin cloud and a bluish-white disc of light with a ruddy outer edge is on display, often surrounded by rings of iridescent colours. This classic example was seen by Cassie Eismann near Fort Scott, Kansas, US.
Soaring beneath altocumulus perlucidus over San Diego, California, US
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A full moon behind a layer of altostratus over Bottesford, North Lincolnshire, England
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Sun Pillar over Oberndorf, Germany
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Altocumulus lenticularis spotted on a drive home after skiing in Mammoth Lakes, California, US
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A majestic view at sunset near the Uptown area of New Orleans, Louisiana, US
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Crepuscular rays over Canberra, Australia
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Stratocumulus over the fields near Anaverde, California, US
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A cloud that Robyn found to be smiling down on her, spotted over Goodyear, Arizona, US
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At 11,600 feet (3,536 meters), a "matching" view of the sky and the snow, spotted over Aspen, Colorado, US
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Altocumulus radiatus over San Bernardino County, California, US
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Contrails over Taipei City, Taiwan
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Mammatus (Mamma) over Hadfield, Derbyshire, England
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Multiple layers of clouds over Shiraz, Iran
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Altocumulus lenticularis over Cardiff, Wales
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Undulatus over National Taipei University, Taipei, Taiwan
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