Three polar vortex systems are anticipated in December, and the first is expected this week, according to AccuWeather. The ...

A weakened polar vortex is expected to bring frigid Arctic air to the central and eastern United States. Louisville could see temperatures in the single digits with wind chills as low as -8 degrees. A ...

Polar vortices exist throughout the year at the poles. In the Northern Hemisphere, the polar vortex expands many times over ...

A rare polar vortex event could push Arctic air far south this winter, potentially exposing 250 million Americans across 40 states to extreme cold—a phenomenon last seen in 1958 and 1968.

Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

A disruptive polar vortex is set to usher in three successive waves of Arctic air across the central and eastern United States through mid-December, bringing dangerously low temperatures and the ...