Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

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 ...

You’ve almost certainly heard of the polar vortex. But what about "sudden stratospheric warming," a weather term that’s started making the rounds on social media? They’re related to one another, and ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe. When you ...