Three separate rounds of Arctic air have already swept across the central and eastern United States through mid-December, ...

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they work.

It has been a warm autumn so far. But the polar vortex is forecast to change unusually early, and that could impact your weather in December. Meteorologist Rob Shackelford breaks down why. Fantasy ...

It seems like you cannot mention cold weather in the fall and winter without coming across the phrase “polar vortex.” Meteorologists often refer to this weather element as a potential culprit behind ...

(CNN) — High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is likely to expand from central Canada and through the midwestern and eastern ...

Nearly all of New England has seen its share of frigid cold days and record mountain snow so far this November — and looking ahead, we’re about to get hit with another blast of Arctic air from a ...

Bundle up. This weekend will get seriously cold. The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a wrecking ball," said ...