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Other Clouds
- Arcus
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- Cap / banner clouds
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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
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- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
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- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
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- 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.
Fog rising off of a golf course during sunrise over Orlando, Florida, US
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Stratocumulus spotted over Yilan, Taiwan
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Sunrise over Cirencester, Gloucestershire, England
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Cumulus fractus spotted over Esfahan, Iran
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A dynamic sunset over Brisbane, Australia
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Low-lying fog on a coastal road near Nieuw-Haamstede, Zeeland, The Netherlands
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Altocumulus stratiformis spotted over Zhongshan, Taipei City, Taiwan
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A plethora of contrails near Washington National Airport, spotted from Falls Church, Virginia, US
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The energy of a developing storm, accompanied by falling precipitation, spotted near Charlo, Montana, US
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A fogbow, which is formed in fog or mist near the ground and often called a 'white rainbow' or 'mistbow'. This classic example was spotted over San Miguel Island, California, US.
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Sunset with subtle signs of supercilium spotted over Crank, Merseyside, England
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A thin layer of fog spotted early in the morning over Poole, Dorset, England
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A line of stratocumulus spotted over Central Province, Iran
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After a week of notable rainfall in the Pacific Northwest, a view of the sunset in an area where there is often a 'rain shadow' due to the nearby Olympic Mountains, spotted over Puget Sound, Seattle, Washington, US
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Altocumulus lenticularis spotted on the western edge of Los Alamos, New Mexico, US
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