But we're still getting asked this question: Just what is the polar vortex, and why is it bringing super-cold temperatures to so much of the U.S.? So here's another go at it.

The polar vortex not only annoyed the millions it blasted with bitter cold in 2014, but also language purists who cringed at the way it was used.

The polar vortex event this week was undeniably cold, sending temperatures 20-40 degrees below average and setting scores of daily records from the northern Plains to the Southeast. It’s fair to ...

What some people are calling the polar vortex, last winter's favorite whipping boy, will make a rare summer cameo in the central U.S. next week in what's typically one of the hottest weeks of the ...

A blast of brutally cold air - thanks to the polar vortex - is roaring across the central and eastern USA early this week, sending temperatures to levels not seen in 20 years. The polar vortex is ...

Polar vortex killed at least 21 By Associated Press Published Jan. 8, 2014, 6:54 a.m. ET Paul Martinka ...

A polar vortex in January 2014 broke records in Columbus, Cincinnati and Dayton all for coldest daily low temperatures. The vortex is back this week.

The frigid air will begin Sunday and last into early next week, funneled as far south as the Gulf Coast because of what one meteorologist called a “polar vortex,” a counterclockwise-rotating ...

The 2014 Buick Encore may be as small as it gets with luxury crossovers, but it performed well in the recent polar vortex -- read this blog only from the automotive experts at Motor Trend.

As of Monday afternoon, the Midwest was battling uncommonly frigid weather that threatened to break some all-time-low temperature records.

To say there’s been a bit of discussion for the last 10 months or so about the polar vortex would be an understatement the size of the Arctic. The phrase is now a permanent part of our ...