Bone-chilling cold and wind chills are expected, with temperatures dropping to 12 to 25 degrees below normal in some states.

A winter storm is set to have a major impact on the Philadelphia area and Delaware Valley Monday, with 3-5 inches of snow​ expected in the city and surrounding counties.

Nearly two thousand flights were canceled, and thousands of others were delayed across the U.S. on Monday after a winter storm blasted a large part of the country with heavy snow and ice.