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

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

Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the North Pole. Real feel temperatures throughout the northeast, including ...

The polar vortex has broken, and severe temperatures are set to dominate most of the country in the coming days. Temperatures in the 10s are forecast for much of the Northeast, and subzero ...

Bitter cold is expected across much of the U.S. this weekend. But what do headlines mean when they say a "polar vortex cold snap" is on the way? The polar vortex is a regular feature of Earth's polar ...