Winter has settled in for the long haul, and the next few days only reinforce that feeling. Tonight brings mostly cloudy ...

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 ...

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

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

A major polar vortex is about to impact the United States — and it could usher in weeks of frigid temperatures for millions of people, even bringing snow to Florida.

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 ...

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

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of ...

Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still ...

Another strong cold front is headed straight for Texas as a polar vortex continues to send arctic blasts spinning off across ...