The infamous weather pattern is actually partly influencing our weather as February ends. And it may again throughout the month of March.

Michigan and the Great Lakes are bracing for another cold shot later month as a polar vortex split in the stratosphere nudges ...

Add Yahoo as a preferred source to see more of our stories on Google. As the polar vortex becomes more active, colder air will surge toward central and eastern regions of the U.S. This polar vortex ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

A Polar Vortex brought temperatures so cold in January 2014 that it froze Niagara Falls. Signals of a rare sudden stratospheric warming in the next two weeks have some forecasting an imminent Arctic ...