When the polar vortex stretches, North America feels the chill. New research reveals some of the stratospheric patterns controlling these cold snaps.

There are more ways than we knew for the stratospheric polar vortex to get disrupted, shooting cold air southwards across North America.

Even in a warming climate, brutal cold snaps still hammer parts of the U.S., and a new study uncovers why. High above the Arctic, two distinct polar vortex patterns — both distorted and ...

Despite a warming climate, bone-chilling winter cold can grip parts of the U.S. In a study appearing in Science Advances, researchers found that two specific patterns in the polar vortex, a ...

Three factors are combining to increase the likelihood of a weaker polar vortex this winter.

A video captured a polar bear charging at a person in Norway's Svalbard archipelago, forcing them to drop their gun and race away on a snowmobile.

Public perception to the contrary, outbreaks of the polar vortex in the northern hemisphere—the bitter cold triggered by the wandering jet stream—are becoming less common.

Why has April in Chicago been cold so far? A big factor is the disruptions in the polar vortex, even as the “polar vortex season” is winding down, according to NBC 5 Meteorologist Kevin Jeanes.

Polar, known for making some of the best running watches, has announced its own subscription plan today, following in the footsteps of Garmin ’s Connect+.

Several days with temperatures of 10-20 degrees below the historical average could be dangerous to plants and ruin outdoor plans.

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.