CHICAGO — Another winter day, another below-zero high temperature for many parts of the Midwest — at least, it seems that way. The deep chill has returned, bringing with it wind chills ranging from the negative teens to 40s, school cancellations and sighs of resignation from residents who are weary of bundling up.
A persistent weather pattern that's driving Arctic air south was forecast to force temperatures to plummet for about 2½ days, starting overnight Sunday. Actual temperatures will range from the teens in northern Kentucky to double-digits below zero in Minnesota, but even colder wind chills were expected: minus 43 in Minneapolis, minus 23 in Chicago, minus 18 in Dayton, Ohio, minus 14 in Kansas City, Mo., and minus 3 in Louisville, Ky.
National Weather Service Meteorologist Scott Blair stopped short of calling the latest round of cold part of the polar vortex, a system of winds that circulate around the North Pole.
"There's really nothing abnormal about the air that's coming into the area," he said. "It's just been a very persistent pattern" of cold air.