Forecasters warn that a split polar vortex is set to bring a 'large supply of cold air' to North America in mid-February as a ...

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S. One of the most notable and widespread Arctic outbreaks that we have seen ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

As we continue to warm moving into February, it appears latest trends suggest a classic "what goes up, must come down" type ...

In normal conditions, the polar vortex spins tightly over the Arctic ... sea ice is surrounded by alternating land and ocean: North America, the Atlantic, Eurasia, the Pacific.

Current trend in heavy snowfall and bitterly cold temperatures is directly linked to a disruption to the polar vortex caused ...

Winter in the CSRA is usually mild overall, but every now and then, we get a taste of true Arctic air. If you’ve ever ...

A rush of Arctic air will plunge parts of North America into bitter cold this weekend, bringing heavy snow, strong winds and frigid temperatures to parts of Canada.

At the same time we go into a touch milder southwest flow, the polar vortex will still be churning away over northeast Canada. I don’t expect a full onslaught of the polar vortex to shift south ...

But when the polar vortex is disturbed, it can cause dangerous cold air to plunge south over North America. An unstable vortex can hit quickly and linger for days on end. For Metro Detroit ...

What’s shaping up to be the most expansive polar vortex in over a decade is about to plunge much of North America, including nearly all of Canada, into the coldest temperatures the country has ...

A ridge into Alaska displaces the polar vortex southwards over nearly all of North America. Dangerous cold is forecast on the Prairies and parts of Ontario with temperatures dipping into the -30s to ...