The polar vortex is splitting — an exceedingly rare phenomenon for this time of year that will be an unusual driver of warmer temperatures, as the calendar flips to March and meteorological spring.

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of Earth’s poles 10 to 30 miles above the surface. The term vortex is used to ...

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

Folks in the central and eastern United States may be wondering: Is winter on the way out? Here's what meteorologists say.

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex is forecast to weaken unusually early, and that could lead to more persistent cold weather in at least parts of ...

Florida has endured a winter few could have predicted. Since early November, the state has endured at least three rounds of ...