Meteorologists had predicted that parts of the U.S. would experience the 10th and coldest polar vortex event this season.

An Arctic blast tied in part to the polar vortex is driving record frigid air south from the Northern Plains toward the Gulf ...

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

Harsh cold descended on the nation's midsection Monday as a polar vortex gripped the Rockies and Northern Plains after winter storms pummeled the eastern U.S. over the weekend, killing at least 17 ...

A severe cold wave, driven by a polar vortex, has struck the central and northern U.S., leading to dangerous temperatures and ...

The latest blast of frigid air will linger across the central and eastern U.S. through much of the week while another winter ...

The latest arctic blast will move into the northern Rockies and northern Plains Saturday and spread to the central and ...

Some of the coldest temperatures are expected in Montana, and avalanche warnings have been issued in Utah, Colorado and Washington.

Ushering in the polar vortex is a winter storm, which was tracking from the Midwest toward the East Coast on Saturday. In ...

A cold weather advisory is in effect until noon Tuesday, with wind chills ranging between minus 15 and minus 25 before ...

The National Weather Service St. Louis office forecast says Belleville had a wind chill of 7 degrees below zero Tuesday ...