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.

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

A rare and disruptive atmospheric event may soon unfold, raising the prospect of significant weather shifts across the U.S.

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 ...

DC swings from a warm 50 weekend to a cold start to the week, with highs in the 30s and a wintry mix as the polar vortex and ...

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation that usually spins quietly above the pole can suddenly send lobes of Arctic ...

Right now, we don’t have any signs of extremely bizarre, warm weather. We don’t need that either in Michigan. Too much warmth ...

The cold weather appears to be here to stay in South Jersey, at least until mid-February. A polar vortex is expected to keep ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex is sending arctic blasts and chilly temperatures to most of the United States, and states from Texas to Oklahoma ...

Could early February's blast of cold in the northeastern United States be one of the last appearances of our wintertime foe, the polar vortex? While forecasters can't yet say that for sure, a warmer ...