Sudden stratospheric warming is expected to keep a weakened vortex splintered, plunging the region back to record-breaking ...

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar ...

The extreme cold that has gripped much of the eastern United States this winter shows no immediate signs of relenting, as a significant disruption to the Polar Vortex is expected to occur later in ...

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren't going anywhere, as a major ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren’t going anywhere, as a major disruption to the Polar Vortex is coming this month.

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.