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

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

Arctic winds grip the US Midwest, fuelling record cold and viral claims of ‘exploding’ trees. Experts explain frost cracking as the polar vortex triggers life-threatening winter conditions.

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 the U.S., and why meteorologists talk about it during major cold events.

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.

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