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

The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation ...

BISMARCK, N.D. (AP) — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the Rockies ... border to Oklahoma and central Texas, where the Arctic front was ...

A polar vortex collapse is set to send the mercury plunging as "extreme conditions" sweep across the US and Canada. The meteorological switch-up is set to develop by the middle of the month and ...

Researchers note that February was also characterised by an extremely strong stratospheric polar vortex - a large spinning mass of cold air in the stratosphere around 15 miles above the Arctic ...

A polar vortex collapse is expected over the next two weeks, causing extreme winter weather and travel disruption across North America. The weather phenomenon is expected to develop in mid-March ...

A polar vortex collapse has been forecast to hit within weeks. The weather phenomenon will hit in mid-March and will affect the United States and Canada predominantly. It will be the second ...

"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 ...