Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

Here’s the wind chill chart. Notice the four shadings, indicating how long it will take for frostbite. When we get to wind ...

In the coming weeks, cold air will continue for parts of the U.S. thanks to the influence of the polar vortex.

The polar jet stream, which is affected by the polar vortex above it, has become quite wavy, allowing Arctic air to ...

Cold temperatures are expected to last through the end of the month — and forecasters say that there's a potential for snow ...

A significant portion of the U.S. is experiencing below-average temperatures due to a disrupted polar vortex, affecting over ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.

And it won’t just feel cold: A series of clipper storms is also expected to bring snow to the region beginning on the evening ...

NORFOLK, Va. — Have you ever wondered why some winters are mild while others bring freezing temperatures and snowstorms? One of the key players in these dramatic shifts is something called the polar ...

Ben Gelber, a meteorologist for NBC4 in Columbus, Ohio, and a Pocono native, said the polar vortex is a large, circular pool of the coldest air in North America that typically hovers high in the ...

One of the new Nexus Mods owners posted an announcement noting that they're moving back to Vortex, ceasing development on ...