An Arctic front is moving into the Chicago area, bringing the coldest weather since the 2019 Polar vortex.
An Extreme Cold Watch issued by the National Weather Service Wednesday was by Thursday morning upgraded to an Extreme Cold Warning for Boone, Will, Cook, DeKalb, DuPage, Kane, Kendall, Kankakee, Grundy, Lee, Lake, La Salle, McHenry, Winnebago and Livingston counties from 3 a.m. Friday until 12 p.m. Friday.
Chicago Public Schools announced it is canceling classes and closing schools Friday because of the extreme weather…