A significant Arctic blast is forecasted to sweep across the U.S. and Canada, bringing the coldest temperatures of the season so far. Meteorologists warn that a lobe of the polar vortex is set to dip into the region, resulting in dangerously low wind chills, with some areas feeling like minus 40 degrees. As warmer days are expected briefly, the upcoming Arctic outbreak may lead to school closings and hazardous conditions in many places, including the Midwest and Northeast. Snow and rain are also anticipated ahead of this severe cold front, which is characterized by near-record lows and could affect a wide stretch from the High Plains to the East Coast.