Fueled by a disturbed polar vortex, 18 states and D.C. have had more snow than average into December. In some areas, snowfall ...

This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

A long-awaited blast of cold air, courtesy of the polar vortex, will overtake much of the US, but the forecast says the low temperatures won't last.

In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is "ramping up from its summer slumber," said meteorologist Judah Cohen in an ...

Another round of bone-chilling air from the Polar Vortex could invade the central and northeastern U.S. this weekend and ...