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

The snow is likely to fall on Sunday from the Appalachians to New England. New York City may see its largest snowfall in years.

From New Orleans to the northshore to Baton Rouge to Lafayette, snow is looking more and more likely as a winter storm moves through the area. "The ceiling for this event could be something astonishing.