Polar Vortex is coming

Winter's first polar vortex blast hits the Upper Midwest and Great Lakes this week with temperatures plunging below zero.Lows here in Ohio will drop into the single digits with high temperatures on Thursday forecast to be 25 degrees below average.Meteorologists have been comparing weather maps and forecast models for days seeing similarities with the Polar Vortex that developed in January 2014. The southward shift then brought the coldest temperatures in two decades.The Polar Vortex is a term us