The “Breast Cloud”: Mammatus clouds are a rare formation that often accompany th
The “Breast Cloud”: Mammatus clouds are a rare formation that often accompany thunderstorms. They are named after… well, mamma,which means “udder” or “breast”. The reasons behind their formation are cloudy, but they only appear during rapid changes of moisture, temperature, and wind speed. (Image credit goes to Wikipedia, En-Derin, and flickr.) -- source link
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