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 ...

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

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.

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

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

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 ...

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 ...