A polar vortex is currently hitting the United States, with schools closed in many parts of the country and at least four ...

January has already been colder than average in most states east of the Rocky Mountains for the first time in two years — and now, more frigid air is coming. A lobe of the polar vortex, a stormy ...

Data from a polar vortex splitting during 2002’s Southern Hemisphere sudden warming event helps expand models to accommodate ...

SEE ALSO: Google's data centers, offices will use 100% renewable energy in 2017 The Upper Midwest, parts of the Plains states ... with a lobe of the polar vortex rotating south out of Canada ...

This is due to what meteorologists call the “polar vortex”, a jet stream of extremely ... to ABC in North Dakota’s largest city. In some states temperatures are so far below 0 degrees ...

Flames from gas-fed heaters are melting away snow and ice at railway intersections in Chicago. It helps to keep the trains running with fewer delays. The US deadly cold snap has caused ...

It's similar to the polar vortex pattern from the winter that turned much of the country into a freezer for weeks at a time, breaking cold weather temperature records in numerous states.

Damond Benningfield A somewhat alarming new phrase entered the American lexicon when parts of the United States were plunged into an especially bitter deep freeze in January 2014: “polar vortex.” ...

The coldest temperature in the lower 48 states this morning was minus-22 ... air associated with a displacement of the dreaded polar vortex. The next polar plunge will take place this weekend ...