A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

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.

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

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 ...

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

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

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

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

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