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 ...

The Pacific Northwest is expected to see up to seven inches of rain this week, as the eastern United States braces for arctic cold.

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 ...

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

Multiple rounds of snow are expected through Wednesday and dangerously cold temperatures will arriving by the week’s end, ...

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

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

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