Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

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

Similarly, wind chill temperatures measure how cold people and animals feel when outside, measuring the rate of heat loss ...

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

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

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

A polar vortex disturbance will drive a winter storm in Kentucky, with snow, frigid temps, and wind chills below zero ...

The polar jet stream, which is affected by the polar vortex above it, has become quite wavy, allowing Arctic air to ...

A vast pool of Arctic air is again spilling south, the kind of outbreak that can turn highways into morguish car lots and ...