A rare "daughter polar vortex" is set to plunge millions of Americans into freezing temperatures as a prolonged period of ...

Forecasters have warned that a rare weather event in the form of a polar vortex will bring snow and ice to millions as it ...

A piece of the polar vortex is spilling into the Midwest, creating extreme cold for the Chicago area and northwest Indiana for the next few days.

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

Abnormal weather events and severe winter storms could be caused by a disrupted polar vortex. Find out here how the polar ...