New York, New Jersey and Connecticut are under winter storm warnings today as the entire region braces for snow. Tri-State Area officials have been issuing warnings and discussing the states' preparations in the days leading up to the storm.

Tens of millions of residents along the East Coast are bracing for several inches of snow Sunday followed by dangerously cold temperatures that will take hold in much of the country from the Northern Plains to the tip of Maine.

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to millions.