The polar dance that caused snow to fall across the South in January has been studied for decades, but scientists still hope ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the polar regions—here’s how it works ...

But here’s where things get interesting: the polar vortex’s behavior is closely tied to the jet stream, a fast-moving river of air that flows high above the Earth. The jet stream acts like a ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

Recent forecasts suggest some Americans might be getting a much-needed break from the freezing temperatures that have gripped much of the country.

As the Arctic rapidly warms, the temperature difference between the polar region and lower latitudes decreases, which weakens ...

The most predictable is seasonal. In the spring, jet streams move towards a polar vortex, helping to contain cold air in the polar regions. In the fall, they move towards the equator and bring ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

The polar vortex is a swirling mass of cold air located over the polar regions. Every few years or so, a dip in the jet stream allows this cold air to sink into the U.S. The last few visits from ...

When this stratospheric vortex becomes disrupted or stretched, it can distort the jet stream as well, pushing it southward in some areas and causing cold air outbreaks. The Arctic polar vortex is ...

Depending on the strength of the polar jet stream determines how the Polar Vortex moves. When the polar jet stream is strong the Polar Vortex is kept at bay and stays in the Arctic. When it is ...