A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

A procession of winter storms is forecast to bring snow, sleet, ice and potentially flood-inducing rain to sprawling bands of the U.S. this week.

Myriad winter weather alerts and warnings remained in place across the U.S. on Tuesday as multiple states battled storms.

A forecast map released on January 13 for the period of January 19 to January 23 indicates that much of the Lower 48 states will likely experience below-average temperatures, as a powerful cold front ...