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

Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

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 ...

The polar vortex is a large-scale weather pattern that typically keeps the coldest air confined to the Arctic region. However, during winter months, this vortex can become unstable, leading to ...

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

“Snow is the $64,000 question,” says climatologist Judah Cohen, capturing the peculiar pucker factor involved in late-winter ...

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

Winter Storm Fern aftermath continues as the East Coast braces for a bomb cyclone and polar vortex, with heavy snow and ...

Around 17 states witnessed snowfall, with more than a foot of accumulation in some areas. The deep freeze strained energy supplies in some states, and the National Weather Service predicted widespread ...

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

An unusually warm and snow-scarce winter has hit British Columbia. Discover how a persistent atmospheric river pattern and a ...