CHICAGO — An arctic air mass that brought snow and ice to an area stretching from the Rocky Mountains to northern New England on Monday was poised to give way to record-breaking cold temperatures. In Chicago, where as much as 6 inches (15 centimeters) of snow fell, an Envoy Air flight from Greensboro, North Carolina,…

via Deep Freeze Could Bring Record-Breaking Temperatures From Rockies to East Coast — TIME