A powerful polar vortex was set to hit the Big Apple on Sunday, bringing with it inches of snow, bone-chilling temperatures and frigid wind chills that will stick around through the coming week. Forecasters declared a winter weather advisory for New York City from 1 p.

A major cold blast is in store for millions of Americans as a lobe of a polar vortex will bring brutally cold temperatures to nearly every American east of the Rockies.

A major Arctic outbreak is building, bringing below-freezing temperatures to more than 100 million Americans next week.