Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

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 ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

Here's the latest on the winter storm. A historic winter storm is poised to produce potentially record-breaking snows from ...

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.s. on alert as a lobe of the polar vortex invades the nation and ... single digits in the northern Plains and ...

MINNEAPOLIS, Minnesota — Our entire region is under an Extreme Cold Weather Warning until 12 p.m. Tuesday; wind chills could fall as low as -45 degrees. This Arctic blast is thanks to a polar vortex.

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and ... extreme danger associated with the cold. In ...

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

Another blast of winter weather is expected in parts of the U.S. in the coming days, including bone-chilling wind in the Northern Plains and unusual snow and ice in the Gulf Coast area.

New York City prepares for severe winter conditions with heavy snowfall and a deep freeze expected this weekend. Temperatures ...