A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

Winter isn’t over yet! A polar vortex is bringing subzero winds, frigid temperatures, and possibly snow to the U.S., ...

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

Extreme cold and snow smacked the Gulf Coast states this week, but the polar vortex may not be to blame.

A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as ...

A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder ...

Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...

An Arctic blast that began in the northern plains on Saturday spread bitter cold from the Rockies through the East Coast and ...

Snow and winds are likely to disrupt traffic, trigger flight cancellations, and cause headaches for people traveling to D.C.

We've already fallen as low as 1° this year. Another dip in the polar vortex makes that possible for Cincinnati again next week.

Anytime we get an Arctic air blast down this far south, this is an artifact of the polar vortex rearing its ugly head,” said ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...