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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.
Cirrocumulus undulatus spotted over Mavora Lakes, Southland, New Zealand
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Cirrocumulus over Falls Church, Virginia, US
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Cirrocumulus over Northside Park, United States
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Cirrocumulus over Jilin Province, China
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Cirrocumulus stratiformis over Khomeynishahr, Esfahan, Iran
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Cirrocumulus cloud formation that appears to have originated from a contrail, spotted near Walnut Creek, California, US
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Cirrocumulus undulatus over Jilin Province, China
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A distrail and a contrail both visible through cirrocumulus, spotted over Wells, Somerset, England
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Cavum (Fallstreak Hole) spotted over Lynchburg, Virginia, US
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A mixture of altocumulus and cirrocumulus spotted over blades of grass near Hohnstein, Saxony, Germany
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A colorful display of iridescence spotted over Winter Haven, Florida, US
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Iridescence along with clouds that Ted described as looking like tattered cloth, spotted over Glouster County, New Jersey, US
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Iridescence with multiple colors spotted over Tacoma, Washington, US
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Cirrocumulus over Baltimore, Maryland, US
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Cirrocumulus floccus undulatus over Hakata Station, Fukuoka City, Japan
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