The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of ...

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

A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...

When parts of the vortex break down, lobes of Arctic air can drift south, guided by changes in the jet stream. This allows ...

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of ...

A significant portion of the U.S. is experiencing below-average temperatures due to a disrupted polar vortex, affecting over ...

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

Forecasters say the first snow storm of the season to take aim at major Northeast cities will dump several inches of snow over the weekend, followed by a bitter Arctic blast courtesy of the polar ...

Another round of bone-chilling air from the polar vortex could invade the central and northeastern US this weekend and potentially produce the first significant snowstorm of the season for the ...

Ready for another round of chilly Christmas weather? Florida may get hit with two or more cold waves this week thanks to a polar vortex system, AccuWeather forecasters say. "We believe that two to ...

Watch as a massive bowl of Arctic air is set to bring extreme, potentially record-breaking cold temperatures to parts of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Ready for some serious cold? The planet's most extreme cold air will be barreling into the central and eastern United States this ...