Folks across the central, eastern and southern U.S. are about to experience potentially record warmth over the next week or ...

The infamous weather pattern is actually partly influencing our weather as February ends. And it may again throughout the month of March.

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.

The phenomenon could significantly disrupt U.S. weather later this month.

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 ...

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest, Mid-Atlantic and Southern U.S. are expected to see below-freezing ...

Michigan and the Great Lakes are bracing for another cold shot later month as a polar vortex split in the stratosphere nudges ...

While forecasters can't yet say for sure, a warmer stretch of weather appears likely for much of the nation. Here's when to expect a warm-up.

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 ...

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 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.