The big picture: A powerful Arctic outbreak tied partly to the polar vortex is set to send temperatures tumbling down to as cold as 25 to 35 degrees Fahrenheit below average for mid-January ...

ANNAPOLIS, Md. (AP) — 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 kept much of the country east of the Rockies ...

NORFOLK, Va. — 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 ...

The polar vortex's icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

NORFOLK, Va. (AP) — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the US, threatening to dump snow on parts of Texas and Oklahoma in ...

NORFOLK, Va. — 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 ...

The polar vortex has plunged much of the U.S. into icy chaos, with snow and ice causing school closures, power outages, and travel disruptions. The storm impacts areas unaccustomed to harsh winter ...

DES MOINES, Iowa 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 ...