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

A winter storm is expected to reach Massachusetts Sunday afternoon and dump up to 8 in. of snow in most of the state, according to the National Weather Service. The storm is predicted to spread across the region between 3 p.

Snowfall forecasts have increased for a winter storm expected to blanket New Jersey with widespread areas of 4 to 8 inches of snow. Winter storm warning areas were expanded early Sunday and a state of emergency is in effect. National Weather Service and AccuWeather