When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation ...

Winter hasn't even officially started, but parts of the country are already bracing for what could feel like the deep freeze of January. Mother Nature seems to have something brewing, and it's not ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

The Polar vortex is causing temperatures to plummet dangerously across the Philadelphia region, and frostbite could become a ...

CHICAGO — Midwesterners trudged ahead Thursday into a familiar, grim reality: temperatures well below zero, schools and businesses closed, stern warnings to wear extra layers or, better yet, just stay ...

ORLANDO, Fla. – Polar vortex. Sudden stratospheric warming. The winter buzz words are back. But what do they mean? Here’s the deal. You may hear polar vortex and sudden stratospheric warming thrown ...

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

A Polar Vortex brought temperatures so cold in January 2014 that it froze Niagara Falls. Signals of a rare sudden stratospheric warming in the next two weeks have some forecasting an imminent Arctic ...