When there are disturbances in which the Jet Stream weakens, it can become wobbly. This allows the cold air to plunge southwards. A disrupted polar vortex does not happen every year. Very much so what ...

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold ...

Learn more. The eastern U.S. is on track for a frigid week as a polar vortex stretches south, bringing below-normal temperatures to Maine. Starting Monday, much of the eastern two-thirds of the ...

Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of cold air that circulates around the Arctic—expands, with the National Weather Service predicting ...

According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, ...

The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...