“The polar vortex has been particularly strong and stable the past few weeks. That has kept the coldest of Arctic air largely confined to the North Pole,” says Mike Bettes, meteorologist with ...

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The term “polar vortex” might conjure images of mythical icy storms swirling through the North Pole but in reality it’s a ...

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.

An April cold snap is expected to bring unusually cold temperatures to the eastern half of the US next week. The cold snap could impact new spring vegetation and lead to frost in some areas.

When the polar vortex is strong and stable, this belt of winds keeps the season’s coldest air locked across the Far North. Occasionally, we’ll see the polar vortex’s circulation weaken and ...

"The large polar vortex disruption from the second week of March is playing a key role in next week’s eastern US cold snap," meteorologist Judah Cohen of Atmospheric and Environmental Research told ...

Don't put away those winter coats just yet. An April cold snap is forecast for much of the eastern half of the U.S. early next week, forecasters said, with freezes likely across portions of the ...

It is strongest in winter. Under normal conditions, the polar vortex remains stable, keeping the cold air trapped around the poles. Sometimes, disturbances in the atmosphere weaken or even break ...