A Weather Alert continues for brutally cold air mass now through Wednesday morning. A cold weather advisory remains in effect until midnight Tuesday night for the entire Chicago area, with wind chills dropping to -20 to -25.

CHICAGO — National Weather Service officials issued a cold weather advisory in effect until 2 p.m. Tuesday for portions of central, east central and northeast Illinois as well as northwest Indiana. Officials said dangerously cold wind chills may reach as low as 28 below zero causing frostbite to those exposed to the frigid temperatures in as little as 30 minutes.