Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

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

Behind the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar vortex ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

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 meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

Extremely cold air is going to take over Michigan, as the center of the Polar Vortex drops far south to just north of ...

A massive winter storm is expected to impact more than half of the United States with some help from an arctic air mass.