As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

What is polar vortex and how much snow is expected in US? A winter storm linked to polar vortex disruption has impacted ...

The United States is facing a storm unlike any seen in a long time. The National Weather Service has confirmed a blast of ...

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...

A polar vortex brings bitterly cold Arctic air into southern Ontario. Here’s what it is and what you can expect.

WASHINGTON (AP) — Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

Colder air is becoming re-established in the central and eastern United States after a recent warmup. Over the next 10-14 ...

An extreme polar vortex moving from the Arctic across North America is expected to arrive in Quebec by Friday and persist ...