US President-elect Donald Trump faces one of the coldest inauguration days in modern history when he is sworn in Monday.

WASHINGTON — Get ready for extreme cold weather in D.C. and most of the U.S. over the next few days. The polar vortex has ...

A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.

Still, several Colorado school districts will start late on Tuesday as the state waits out the last of subzero temperatures.

The mere mention of the term "polar vortex" can set your head spinning (and maybe eyes rolling). It’s got to be clickbait, ...

But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex. This swirl of frigid air, located more than 10 miles above Earth’s surface, strengthens each year ...

This will be due to a polar vortex, an area of strong winds that encircle the Arctic and typically keeps the coldest air locked near the Pole, according to the FOX Forecast Center. This weekend ...

One of the key players in these dramatic shifts is something called the polar vortex. The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the ...

When this stratospheric vortex becomes disrupted or stretched, it can distort the jet stream as well, pushing it southward in some areas and causing cold air outbreaks. The Arctic polar vortex is ...