CHICAGO (CBS) — A Weather Alert will be ... We are tracking the return of the polar vortex next week as a wavy jet stream brings a blast of Arctic air to the Great Lakes. Air temperatures ...

A group of people walk toward the pedestrian tunnel that connects Hyde Park to Promontory Point as Presidents Day temperatures dropped and stayed cold across the Chicago area on Monday. Tyler ...

A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge ...

BISMARCK, N.D. — Harsh cold descend on the nation’s midsection Monday as a polar vortex gripped the Rockies ... now’: Protests have taken over Chicago. Here’s what to know.

A bitter blast of Arctic air is roaring south across the central U.S. Tuesday, bringing with it record cold temperatures and "dangerously" low wind chills.

The polar vortex could bring a cold blast to millions across America in the second half of March, AccuWeather said in a media ...

Winter weather lingers as a major shift in the weather pattern could have millions across the United States once again ...

There is a sudden warming about to happen high up in the atmosphere. This warming usually affects the Polar Vortex.

Bitter cold temperatures are expected to continue throughout the week in Chicago, with wind chills plunging to minus 20, the National Weather Service said. A cold weather advisory is in effect ...

on Sunday. Timothy D. Easley/Associated Press Share BISMARCK, N.D. — Harsh weather moved west on Monday as a polar vortex was expected to grip the Rockies and the northern Plains after winter ...