The polar vortex, a swirling mass of cold air encircling the North Pole, is sometimes disrupted by sudden stratospheric ...

Every winter, the phrase "polar vortex" returns to headlines, usually when a cold snap is on the way. The term gets stretched ...

A new model accurately reproduces aspects of polar vortex behavior, extracting indicators of imminent vortex collapse and accompanying frigid weather in North America and Europe.

The polar vortex, a circulation of cold air over the Arctic, is currently stronger than normal. A strong and stable polar vortex helps keep the coldest Arctic air contained near the North Pole. A very ...

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 ...

A stronger polar vortex is developing over the Arctic. Here's what it could mean for winter, including the role of a powerful El Niño.

A strong polar vortex and a powerful El Niño would be signals that a milder winter may be in store for many Americans. Here's why.

The polar vortex and super El Niño can affect one another, changing winter conditions. Here's how North Carolina could be ...