The plunging polar vortex is bringing subfreezing temperatures to some of the southernmost points of the U.S. A forming storm ...

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it?

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit ...

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

Parts of all states in the lower 48 woke up to subfreezing temperatures Tuesday due to a weather pattern that will keep ...

The polar vortex has triggered freeze warnings and advisories across Texas, threatening human safety and infrastructure.

Temperatures plunged into the teens and single digits in some spots, and the snow-dusted winds are driving the wind chill below zero. The polar vortex, a swirling mass of Arctic air typically ...

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

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 ...