An amazing supercell storm formed Sunday near Newcastle, Wyoming.  This time-lapse video shows the growth of the storm from some heavy clouds to what almost became a tornado. The storm in Wyoming did not produce a tornado, but it did hail.  According to 7News Chief Meteorologist Mike Nelson, Higher temperatures and more humidity would have turned it into a full-blown tornado.

Thanks to BaseHuntersChasing and YouTube for this amazing video:

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