A forecast map reveals which states can expect to see “persistent cold” in the weeks ahead, after experts said the polar ...

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

The polar jet stream, which is affected by the polar vortex above it, has become quite wavy, allowing Arctic air to ...

Ben Gelber, a meteorologist for NBC4 in Columbus, Ohio, and a Pocono native, said the polar vortex is a large, circular pool ...

Colder air is returning to the central and eastern U.S. as the polar vortex becomes more active, bringing fluctuating ...

Cold temperatures are expected to last through the end of the month — and forecasters say that there's a potential for snow ...

The first cold wave will reach the East Coast on Thursday, followed by another surge of frigid air this weekend and more next ...

A shift in the polar vortex has forecasters watching closely as the coldest air of the season approaches. Here's what to know ...

U.S. natural gas futures have ignited, surging 27% to trade near $3.94 per MMBtu. Here are six stocks to watch.

The displacement of the polar vortex over the eastern half of the U.S. will usher in days of Arctic cold through the end of ...