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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
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- Flammagenitus (Pyrocumulus)
- Floccus
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- Fractus
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- Lacunosus
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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
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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
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.
Supercilium, an unofficial classification for a short-lived cloud feature, which appear in turbulent airflow over, and to the immediate lee of, steep mountain peaks during periods of strong mountain summit level winds. This classic example was spotted near Busquistar, Andalusia, Spain.
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Altocumulus lenticularis duplicatus spotted near Capdenac, Lot, France
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Altocumulus lenticularis duplicatus, also known as pile d'assiettes, spotted over Hexham, Northumberland, England
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Altocumulus lenticularis duplicates with cumulus fractus in the foreground, spotted over Patagonia, Argentina
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A classic example of pileus forming over a developing cumulonimbus, spotted over Kilgore, Texas, US
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Horseshoe vortex spotted in between summer thunderstorms over Torquay, Victoria, Australia
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Cirrus uncinus on grand display near San Luis Obispo, California, US
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Sun Dogs, also known as a Parhelion, on a cold day near Brighton, Colorado, US
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A classic example, as well as a mesmerizing display, of altocumulus stratiformis radiatus, spotted by Travis and his students at Santa Rita Middle School, Liberty Hill, Texas, US
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Altocumulus lenticularis duplicatus over Gorbea, a mountain with a height of 1,482 meters above sea level, in the Basque Country, Spain
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Mammatus (Mamma) spotted over Woden, Canberra, Australia
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Dual lightning strikes near Siler City, North Carolina, US
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Fogbow over Llangorse, Brecon, Wales
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Cumulus congestus that appears to be on the verge of developing into a cumulonimbus, with a classic example of pileus over the top of its formation, spotted near Tuggeranong, Australian Capital Territory, Australia
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A primary rainbow and a subtle secondary rainbow spotted during a storm near Mercogliano, Italy
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