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

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

A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...

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

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

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

The brief respite of a January thaw is over as a significant pattern shift readies a return to harsh winter conditions across ...

This article originally published at Polar vortex sends another arctic blast barreling toward Texas. In today's edition: ...

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

Florida reels from a rare statewide cold snap, with temperatures 30°F below mid-January averages in northern areas, impacting ...

Ready for another round of chilly Christmas weather? Florida may get hit with two or more cold waves this week thanks to a polar vortex system, AccuWeather forecasters say. "We believe that two to ...