More than 200 million Americans are bracing for a historic Arctic outbreak as a displaced polar vortex sends frigid air ...

Polar vortex systems will bring dangerously cold weather to much of the U.S. this month. Learn how to stay safe, and which ...

Parts of the Upper Midwest and Northern Plains are already feeling the effects of air spilling in from Canada. On Thursday, ...

In 2014, the term “polar vortex” burst on the scene across Canada and the U.S. as temperatures plunged. In some places, it ...

The coldest temperatures of the season so far will persist through Friday morning, with overnight lows dropping into the ...

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold and heavy snow accumulations to ...

The persistent cold pattern reflects temperatures averaging more than 10 degrees below normal across Michigan over the past week, with the clipper train expected to continue bringing periodic snow ...

Michigan could see a return of Arctic air around Thanksgiving as models suggest a possible wobble in the polar vortex, which ...

An arctic blast is expected to bring cold temperatures and potential heavy snow to Ohio and other parts of the U.S. around Thanksgiving. Travelers should anticipate delays on Tuesday and Wednesday ...

Early-season stratospheric warming events spark hype around frigid temperatures. Learn the myths and the science about the ...

It’s all about diversity. Whether in biology, in culture, in training, or in technology, when conditions change a system survives if there is sufficient diversity to adapt. Otherwise it dies. And ...