A reinforcing shot of polar air is bringing the coldest weather of the season thus far into the region.
Temperatures Monday will hover around 10 degrees for much of the day.
Blustery west, northwest winds will make it feel even colder, bringing wind chills of 5 to 15 below zero.
Once the sun goes down the mercury will really start to drop. Overnight lows are expected to fall to around 1 above in the city to 5 below in counties near the Illinois, Wisconsin border.
A Wind Chill Advisory has been issued from 6 p.m. Monday until 9 a.m. Tuesday for Cook, Du Page, McHenry, Kane, De Kalb and Lake counties in Illinois.
Dangerously low wind chills of -15 to -25 are likely across the region Monday night.
After a bitterly cold night temperatures will struggle to rebound Tuesday.
Even with ample sunshine highs are only expected to top out around 10 degrees. We will see temperatures drop into the single digits Tuesday night and should reach the low 20s Wednesday afternoon. The current forecast calls for us to finally see temperatures above freezing Sunday afternoon.
If this verifies, this will be the longest stretch of sub-freezing weather since late January and early February of 2011, in the days surrounding the blizzard of 2011.
For the latest weather updates, go to: www.chicagoweathercenter.com