This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

Another severe-cold outbreak has pushed onto the Prairies, courtesy of the polar vortex. Part of the polar vortex has branched off and dove south across the Prairies. The origins of this coldest lobe ...

The polar vortex may be saying its goodbyes today, but for many Canadians, the bitter deep freeze isn't going anywhere just yet. Southern Ontario is starting to see some relief today, after enduring ...

LOWELL, Mass. — Americans expecting the worst winter weather to slam the East Coast might need to look northwest instead. A major study spanning four decades reveals that severe winter storms are ...

The polar vortex is in its final month as the condition that kills it is now occurring. The polar vortex is a swirling vortex most often centered over the top of the globe and hovers over the north ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. From the polar vortex to the pollen vortex, ...

The polar vortex could make an appearance in U.S. forecasts next week, when bitterly cold air is expected to move southward out of the Arctic. But the polar vortex is nothing new. (NOAA) Saturday ...