This week we're stuck in a cold air outbreak that some experts say is happening more frequently, and paradoxically, because of a warming world.

The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., threatening to dump snow on parts of Texas and Oklahoma in the coming days and ...

ROCHESTER, N.Y. — People across the country and the Rochester area are feeling the impact of the polar vortex. While the polar vortex typically stays in the Arctic, its jet stream could weaken in the ...

Schools in several states will remain closed on Wednesday after a winter storm brought over a foot of snow in some areas.

South Florida faces an Arctic blast and polar vortex. Will this cold snap lead to an ultimate measure of cold weather here?

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be ...

Winters are getting warmer across New England, that we know. So when we do get a frigid blast of subfreezing weather like ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend ...