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Asperitas and lacunosus spotted in tandem over WInnipeg, Manitoba, Canada
Patterns in the sky over Bangkok, Thailand
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Altocumulus lacunosus spotted over Turville, England
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Lacunosus spotted over Madison, Wisconsin, US
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Asperitas and signs of lacunosus spotted over Rochester, New York, US
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Lacunosus spotted over Gent Sint-Amandsberg, Belgium
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Dynamic iridescence spotted at sunrise over Brighton, Colorado, US
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Signs of supercilium and lacunosus spotted near Mercogliano, Italy
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Signs of lacunosus spotted over Cheyenne, Wyoming, US
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Lacunosus, a relatively rare and short-lived cloud formation, takes on the look of a honeycomb pattern of round holes with frayed edges. It is formed when a layer of rising warm air and a layer of cold air come into contact with one another, causing downdrafts that push through the cloud. This classic example was spotted by Alexia's friend, Bob Hunter, near Lexington, Virginia, US.
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Signs of larger shaped lacunosus spotted over Gibsons, British Columbia, Canada
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Cirrocumulus with some limited signs of lacunosus, spotted over Taiwan
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An intricate web of undulatus, accompanied by signs of lacunosus, spotted over Lake Stevens, Washington, US
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Remnants of what appears to be a form of lacunosus, spotted over Highlands, North Carolina, US
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A unique juxtaposition of lacunosus with a vivid display of the Northern Lights (Aurora Borealis), spotted over Southern Alberta, Canada
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Cirrocumulus with signs of lacunosus spotted over Bethany, Oklahoma City, Oklahoma, US
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