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Mammatus (Mamma) and subtle signs of asperitas spotted over Kamloops, British Columbia, Canada
Asperitas and lacunosus spotted following a morning thunderstorm over El Paso, Texas, US
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Following a few days of white mist/rain that concealed the mainland, a grand display of clouds became visible near the Isle of Skye, spotted while looking across to mainland hills and Loch Hourn, Scotland
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A storm system with signs of asperitas over North Dundas Township, Ontario, Canada
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Signs of asperitas spotted over Frywald, Poland
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Asperitas and mammatus (mamma) ahead of a storm system, on one of Helen's best cloud spotting days, near Wells, Somerset, England
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Signs of asperitas and lacunosus spotted near Nash, North Bucks, England
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Asperitas over São Paulo City, Brazil
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Asperitas over Pembroke, Pembrokeshire, Wales
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A storm system with subtle signs of asperitas, spotted over Brockenhurst, New Forest, England
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Signs of asperitas over Somerset, England
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Asperitas spotted over Seoul, South Korea
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A well-defined arcus marks the leading edge of this storm system, which is accompanied by asperitas and signs of lacunosus, near Fort Wayne, Indiana, US
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Asperitas and signs of lacunosus spotted over Tanti, Córdoba, Argentina
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Asperitas with lacunosus spotted by Jeffrey while re-deploying a gas analyzer on the MOFLUX tower that measures the breathing of the forest, near Baskett Forest, Boone County, Missouri, US
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Signs of asperitas which was accompanied by wildfire smoke in the air, spotted near Bluff, Utah, US
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