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Main Cloud Types
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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
- Fluctus (Kelvin-Helmholtz)
- Fractus
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- Incus
- Intortus
- Lacunosus
- Lenticularis
- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
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- Noctilucent
- Pannus
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- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
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- '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
Lacunosus, a rare, short-lived formation, is identified in terms of the gaps between cloud elements, rather than the clouds themselves. It is when a cloud layer is composed of more or less regular holes, around which fringes of cloud form, like a net or rough honeycomb. The holes of this variety are formed by sinking pockets of air, and the cloud fringes around them by air rising up between the pockets to replace them. Such sinking can occur when a layer of cooler air finds itself over a warmer one. Being more dense, the cooler air sinks down through the warmer air. This classic example was spotted on a cold morning over Priddy, Somerset, England.
Corona over Lochbuie, United States
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Cirrus vertebratus spotted on a hike in the Sonoran Desert, near Sabino Canyon, Tucson, Arizona, US
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Arcus, also known as a shelf cloud, ushers in precipitation from a storm over New Brighton Beach, Christchurch, New Zealand
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A colorful sky filled with altocumulus at sunset over Hilton Head, South Carolina, US
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Signs of lacunosus over Montana, US
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Cumulus congestus following a rainy morning near Oakland, California, US
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Sunset over Chilwell, Nottingham, England
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Altocumulus over Sanxia District, New Taipei City, Taiwan
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Looking west from out of a window on the 16th floor, Gregory captures this sunset from the Upper West Side, Manhattan, New York, US
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Stratocumulus over Charlotte, Michigan, US
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Altocumulus stratiformis undulatus, as seen from above the clouds, on a flight over Fort Wayne Indiana, US
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Asperitas over Carlyss, Louisiana, US
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A storm system over Antelope Valley near Lancaster, California, US
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After three days of whiteout snow and wind, Darren shared that this was the view from the top of the chair lift, with a classic example of an altocumulus lenticularis spotted over Flaine, France.
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