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A large storm system that developed partly from the weak remnants of a Pacific Basin hurricane, spotted over the mountains in western Texas, US
Multiple lightning strikes over Bluff, Utah, US
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Mamma (Mammatus) over Summonte, Italy
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Supernumerary bows, which consist of tiny fringes inside the primary bow, along with a subtle secondary bow, spotted near Zeebrugge, Belgium
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Waterspout near Pointe du Conguel, Quiberon, Brittany, France
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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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Volutus (Roll Cloud) associated with a storm system that produced heavy rain, as spotted by Anuja's nephew, Akshay Shankar, over Bangalore, India
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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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Lightening over Bluff, Utah, US
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Large storm system near Brighton, Colorado, US
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Mamma (Mammatus) clouds following a thunderstorm over Chalfont, Pennsylvania, US
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Lightning over Bluff, Utah, US
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Mamma (Mammatus) over L'Escala, Spain
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A large and active storm system over Brighton, Colorado, US
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