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

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles.

A tyrannosaur that lived 70 million years ago in Alaska wasn't nearly as big as Tyrannosaurus rex, but it wasn't as small as ...

We are halfway through winter and after an exceptionally warm start, North America’s winter is transitioning toward more ...

Mr Chenard said central and eastern parts of the US would face the most below ... by a weakening of the polar vortex. The polar vortex is an air mass above the North Pole, located high in the ...

A polar vortex, which is a large pocket of cold air that swirls in place over the North and South Poles ... like the northern Plains, could face a risk of heavy snow next week.

A polar vortex, which is a large pocket of cold air that swirls in place over the North and South Poles ... like the northern Plains, could face a risk of heavy snow next week.

A polar vortex, which is a large pocket of cold air that swirls in place over the North and South Poles ... Some parts of the country, like the northern Plains, could face a risk of heavy snow next ...

According to AccuWeather, areas south of those getting snow—from the Plains to the Ohio and Tennessee Valleys—could face a ... disrupt the polar vortex, moving warmer air north and pushing ...

Bitter temperatures are forecast to hit swathes of the U.S. this weekend as a polar vortex—the area of ... such as young infants and senior citizens, also face a higher health risk from plunging ...