Winter has settled in for the long haul, and the next few days only reinforce that feeling. Tonight brings mostly cloudy ...

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

In the coming weeks, cold air will continue for parts of the U.S. thanks to the influence of the polar vortex.

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

Each of these lobes of the Polar Vortex will bring two or three days of bitterly cold, below-normal temperatures. We aren’t ...

Ben Gelber, a meteorologist for NBC4 in Columbus, Ohio, and a Pocono native, said the polar vortex is a large, circular pool of the coldest air in North America that typically hovers high in the ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.

Moreover, the latest data suggests that the Polar Vortex is on the verge of a significant disruption due to a new SSW event. The disruption is expected to lead to a colder pattern across the United ...

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

A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...

The brief respite of a January thaw is over as a significant pattern shift readies a return to harsh winter conditions across ...

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