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

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

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.

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

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

A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...

Severe winter chill is expected to plunge central and eastern states into below average temperatures as the polar vortex ...

Each of these lobes of the Polar Vortex will bring two or three days of bitterly cold, below-normal temperatures. We aren’t ...

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of ...

Colder air is returning to the central and eastern U.S. as the polar vortex becomes more active, bringing fluctuating ...

The polar vortex is bringing bitter cold and snow to NJ this weekend. Here's the weather forecast, from timing to how much ...

Another polar vortex is expected to bring subzero temperatures that will affect more than 40 million Americans in the coming ...