A colossal supercell thunderstorm cloud over Montana and other astonishing photos of the massive storm systems

These colossal storm systems center on mesocyclones, which are rotating updrafts that can span several kilometers and deliver torrential rain and high winds including tornadoes. Read More Home | Mail Online http://www.dailymail.co.uk/home/index.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490

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