A warming Arctic can stretch the polar vortex, a high-altitude air ribbon, one says. The “wobble” can disrupt the jet stream, causing extreme cold in the East. By Eric Niiler If the planet is getting ...

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For new readers, here’s a brief overview. The Polar Vortex is a large scale winter circulation over the Northern Hemisphere. Imagine it as a spinning wall of wind above the polar regions, stretching ...

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 ...

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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 ...

As the Great Lakes region braces for a predicted near-record cold this weekend, Michiganians are again cursing the dreaded "polar vortex." But what exactly is this meteorological menace? And why is it ...

WASHINGTON (AP) — Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much of the United States a devastating dose of winter weather ...

A polar vortex is expected to bring two surges of extremely cold air to the U.S. in January. The polar vertex is a large area of low pressure and cold air that sits over Earth's poles. Middle ...

Update — If you’ve been waiting for a "classic" winter wallop, this weekend looks like it will finally deliver. A winter storm is going to develop on Friday in the southern Plains and track east, with ...

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 ...