The entire Delaware Valley will see snow Sunday, with 3-6 inches expected in Philadelphia. On Monday and Tuesday, temps plummet into the teens and single digits.

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

Storm Demi is forecast to bring snow to some of the nation’s largest cities, including Washington D.C., New York, and Boston, on Sunday. The winter storm will also usher in cold temperatures in its wake.