Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

As the polar vortex stretches its icy grip, America braces for a winter like no other. Discover the forces behind this ...

After a brief pause in the arctic air during the end of the workweek, a series of frontal boundaries will help usher in the coldest air of the season ... a maximum of 1 to 3 inches of snowfall ...