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Optical Effects
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Mammatus (Mamma) spotted at sunset over Mercogliano, Italy
Mammatus (Mamma) spotted over Sourton Down, Okehampton, England
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Notable mammatus (mamma) within a storm system over Bluff, Utah, US
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Mammatus (Mamma) spotted over North Gloucestershire, England
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An expansive display of mammatus (mamma) spotted by Sally Grace Mindrebo, over Albuquerque, New Mexico, US
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A vivid rainbow accompanied by mammatus (mamma), spotted from the National Center for Atmospheric Research’s (NCAR) Mesa Laboratory, near Boulder, Colorado, US
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Mammatus (Mamma) spotted during a storm over Stoke Newington, London, England
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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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Mammatus (Mamma) associated with a storm system over Ireland
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Mammatus (Mamma) spotted by Cliff's daughter, Elizabeth McQueen, over Market Harborough, Leicestershire, England
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Mammatus (Mamma) following a storm over Idaho State University, Pocatello, Idaho, US
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Pyrocumulus as a result of the Mine Creek Fire, approximately 48 kilometers to the south of Lower Nicola, British Columbia, Canada
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Mammatus (Mamma) at sunset over Hyderabad, India
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Mammatus (Mamma), often associated with thunderstorms, are indicative of sinking cold air that's carried into warmer air layers and create the characteristic bumpy, rounded appearance, as seen here over Hovell's Creek, Geelong, Victoria, Australia.
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Mammatus (Mamma) spotted by Sara's niece over Montana State University, Bozeman, Montana, US
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An approaching storm system near Brighton, Colorado, US
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