Temperatures are set to drop again in the Midwest and Northeast starting Sunday, a forecast that already is prompting the return of the phrase “polar vortex” -- widely used to describe the blast of cold air that chilled the U.S. earlier this month. But while the Upper Midwest, Great Lakes and the interior Northeast will experience below-average temperatures in the coming week, don't call it a “polar vortex,” meteorologists say.
The "polar vortex" is a real weather phenomenon, just not one that actually visits the United States, they say. It's actually a circular weather pattern that has always been stationed above the Arctic,