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

Jet Stream Connection: A disrupted polar vortex often affects the polar jet stream, making it wobble and allowing cold air to push farther south while warm air moves north in other regions ...

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 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 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.

"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 ...