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Turbulent skies at sunrise over Maui, Hawaii, US
A dynamic view of undulatus and mammatus, ushering in the arrival of a front along the Oregon Coast, near China Creek Beach, Bandon, Oregon, US
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Following a particularly strong line of thunderstorms, accompanied by a few tornadoes in the region, Scott captured this stunning view of mammatus (mamma) as the storms departed the area near Plymouth, Wisconsin, US
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A storm system near Villafranca de los Barros, Spain
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Development of mammatus in conjunction with a storm system over Northwest Iran
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During an afternoon wherein there was a Tornado Warning for the county, mammatus (mamma) clouds develop in association with a storm, spotted over Wiliamson County, Texas, US
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Mammatus (Mamma) spotted three miles east of Provost, Alberta, Canada
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Supercilium and developing mammatus over the Adirondacks, near Vermontville, New York, US
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A stunning reflection of mammatus (mamma) over Stoneridge Lake, Yukon, Oklahoma, US
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Mammatus (Mamma) spotted over Canutillo, Texas, US
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Signs of mammatus as a storm moved into the area near Temecula, California, US
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Mammatus (Mamma) spotted over North Devon, England
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Mammatus (Mamma) spotted over Northern California, US
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Mammatus (Mamma) spotted over San Bernardino County, California, US
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Mammatus (Mamma) over Mill Park, Melbourne, Australia
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Signs of developing mammatus (mamma) over Cardiff, Wales
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