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

On March 9, the polar vortex wobbled and then snapped back the other way as mighty winds, suddenly shifting from the west to the east - something that typically happens once a year - usually in the ...

Researchers note that February was also characterised by an extremely strong stratospheric polar vortex - a large spinning ... Co-author Jeff Knight, the science lead in monthly to decadal ...

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' is set to plunge the United States back into the frigid weather much of the country suffered through in February. This weather phenomenon is expected to bring more winter ...

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 ...