A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

A powerful winter storm, influenced by a polar vortex, is impacting much of the U.S., bringing heavy snow, ice, and extreme ...

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of Florida seeing snow.

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

The polar vortex is unleashing an extreme cold wave across the United States, bringing a historic arctic blast, violent snowstorms, and freezing rain. Millions of people are facing one of the most ...