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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
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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A stunning reflection of mammatus (mamma) over Stoneridge Lake, Yukon, Oklahoma, US
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Mammatus (Mamma) over Mill Park, Melbourne, Australia
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Mammatus (Mamma), which can accompany thunderstorms, spotted over Boston Spa, West Yorkshire, England
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Mammatus at sunset over Siler City, North Carolina, US
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Mammatus (Mamma) spotted over Woden, Canberra, Australia
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Mamma (Mammatus) spotted over Las Vegas, Nevada, US
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Mamma (Mammatus) over Mercogliano, Italy
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Mamma (Mammatus) over Summonte, Italy
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Mamma (Mammatus) spotted over Bedford, England
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Mamma (Mammatus) over the Big Bend Region of Southwest Texas, US
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Mamma (Mammatus) over Arak, Markazi, Iran
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Mamma (Mammatus) tend to form on the underside of an incus associated with a cumulonimbus storm cloud. However, mamma cloud formations can occur on a range of cloud types, albeit usually following the passage of a storm. This example was spotted near Boca Raton, Florida, US.
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Mamma (Mammatus) following the passage of a summer thunderstorm which Nick said ushered in cooler air over Palma, Mallorca, Spain
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Mamma (Mammatus) clouds following a thunderstorm over Chalfont, Pennsylvania, US
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