This story has been edited to correct an error. Judah Cohen is affiliated with the Massachusetts Institute of Technology. Our old wintertime friend the polar vortex ...

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest, Mid-Atlantic and Southern U.S. are expected to see below-freezing ...

Frigid Arctic air can be pushed south thanks to the polar vortex, which triggers cold snaps with temperatures plunging to lows that can lead to extreme cold warnings in Ontario, and elsewhere. Get our ...

The polar vortex collapsed, and severe temperatures are set to dominate most of the country in the coming days. Single-digit temperatures are forecast for much of the Northeast, and subzero ...

You’ve probably heard the term “polar vortex” a lot this winter. But what is it exactly? Imagine a “whirlpool” of cold air that sits high above the Arctic. That is the polar vortex. It’s not a ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all scientists agree. By Eric Niiler The polar vortex is a ribbon of ...

Despite being notorious for bringing brutal cold and dangerous wind chills, the polar vortex has a surprising upside. Discover how it can lead to clearer skies, fewer storms, and ideal conditions for ...

Mathew Barlow has received federal funding for research on extreme events and also conducts legal consulting related to climate change.. Judah Cohen does not work for, consult, own shares in or ...

A forecast map reveals which states can expect to see "persistent cold" in the weeks ahead, after experts said the polar vortex would unleash waves of icy air across parts of the U.S. through January.

Polar vortexes are a year-round phenomenon. But Chicago-area residents only notice them when they collapse, experts say. That’s what’s happening starting Thursday when dangerously frigid air from ...

Satellite image of a bomb cyclone. It’s winter in the Northern Hemisphere. We are actually having a proper one this year. Irrespective of what is going on with our climate, it is supposed to be cold ...

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of Earth, to the stratospheric polar vortex. When you purchase through links ...