Winter weather is making its presence known across the U.S. as millions of people deal with the onslaught of a long-duration, lake-effect snowstorm that has paralyzed communities downwind of the Great Lakes. And to make matters worse, rounds of arctic air will continue to invade the country and send temperatures tumbling below freezing in cities as far as the Southeast. The FOX Forecast Center said the arctic blast from Canada has been sweeping across the central and eastern U.S. Temperatures in cities in the northern Plains plummeted below zero over the weekend, and wind chills made it feel even colder....