The Polar Vortex in the upper atmosphere has disintegrated after the intense warming of the stratosphere in mid-March.

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

BISMARCK, N.D. (AP) — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the Rockies ... Virginia and Ohio. In Nebraska, where much of the state was under ...

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 ...

"The large polar vortex disruption from the second week of March is playing ... with an inch or less in northeast Ohio. Weather service forecast offices across the central U.S. are already warning ...

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.

"The large polar vortex disruption from the second week of ... with an inch or less in northeast Ohio. Weather service forecast offices across the central U.S. are already warning about the ...

The Polar Vortex in the upper atmosphere has disintegrated ... a huge portion of the eastern US by Tuesday afternoon, covering Ohio Valley, Great Lakes, Mid-Atlantic, and Northeast.