Frigid wind chills of -50 degrees and lower hit parts of the Midwest early this week – with some seeing high temperatures below 0 – all thanks to the polar vortex. But, what the heck is the polar ...

Extreme cold is set to grip much of the country starting this weekend with the return of the polar vortex. Some regions are expected to see temperatures in the negatives early next week. TODAY’s Al ...

NEW YORK — Another round of bone-chilling air from the Polar Vortex could invade the central and northeastern U.s. this weekend and potentially produce the first significant snowstorm of the season ...

Current forecast models show the circulation of the Polar Vortex weakening later this week into the weekend. As this occurs, cold air is expected to spread across much of the Central and Eastern U.S.