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 ...

It's as if the world has been turned upside-down, or at least its weather. You can blame the increasingly familiar polar vortex, which has brought a taste of the Arctic to places where winter often ...

Following more wintry weather from storms this weekend in the Midwest and Northeast, warmth will build and expand over the central and eastern United States this week. However, Accuweather's ...

Roughly twenty miles above Earth's surface, in a largely invisible layer of the atmosphere called the stratosphere, some of the most dramatic temperature changes on our planet unfold. Major sudden ...