CHICAGO (WLS) -- An arctic blast moved into the Chicago area overnight, leaving behind a bitter cold on Martin Luther King Jr. Day. The day started with single digit temperatures with a wind chill of -7 degrees at O'Hare. A Cold Weather Advisory is in effect until noon across the entire Chicago area and Northwest Indiana.

Wind chills could hit 25 below as Arctic air tightens its grip on the Chicago area. Here’s what to expect today and beyond.

The average high temperature in the Chicago area is right around the freezing mark in January, but that will be a rare sight in coming days.

The forecast for Sunday’s divisional round game in Chicago calls for temperatures near single digits, wind chills below zero, and the possibility of snow at Soldier Field. Outside observers have wondered whether those conditions could slow the Los Angeles Rams’ high-powered offense against a Bears defense known for forcing turnovers.

Light to moderate snow is falling across the Chicagoland area this evening and will taper off by mid-evening, leaving us with just a few scattered snow showers during the overnight. Most areas will see an inch or less when all is said and done.