The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

An Extreme Cold Warning starts overnight as an Arctic front will bring the coldest weather the Chicago area has seen since ...

Cold temps are not uncommon in January, but the polar vortex-related extremes the Elgin-area will see Friday are downright ...

After this weekend's snow storm moves out, cold Arctic air will move in.

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

It exists all the time, but it usually gets stronger in winter. When the jet stream (a river of wind) bends and dips south, ...

A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

As a winter storm approaches Western North Carolina and other regions, here's what to know about deciphering forecaster terms.

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here ...

"Bitter cold could linger through the end of the month," the Weather Prediction Center said in an update on Monday.

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...