Snow, Ice, Freezing Rain: Winter System Brings Advisories, Warnings to Chicago Area

on Jan22

22 January 2019 | 10:17 pm

After a weekend of snow, the Chicago area is bracing for a new winter system to bring additional snow, freezing rain and ice, which could cause problems for many ahead of the afternoon and evening rush hours Tuesday. 

Some locations could see as much as 5 inches of snow mixed with ice accumulations of up to two tenths of an inch before the system comes to an end Wednesday, making travel conditions dangerous for several hours. 

A Winter Storm Warning was issued for McHenry County until noon Wednesday, warning of up to 7 inches of snow in addition to ice accumulations of up to one tenth of an inch. 

A Winter Weather Advisory takes effect as early as 9 a.m. Tuesday and continues across the area through Tuesday evening and Wednesday afternoon. The timing and precipitation estimates vary across the area (see below). 

What Does Lake-Effect Snow Actually Mean?

[CHI] What Does Lake-Effect Snow Actually Mean?

“A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Expect slippery roads and limited visibilities, and use caution while driving,” the alert states. 

The wintry mix comes just days after a snowstorm dumped several inches of snow across the area, with some spots seeing more than 10 inches. 

Light snow is expected to develop during the late-morning hours Tuesday and begin mixing with freezing rain and sleet at times. 

The icy combination could last for several hours, making for difficult travel conditions before transitioning to rain in southern sections by the evening hours. Snow will continue in far north and northwest counties during the evening hours and overnight, but will likely transition to mainly rain for areas south of Lake, McHenry and Boone counties. 

Many areas will likely see a light icy mix changing to all snow again Wednesday morning before ending by the late-morning hours. 

Here’s a breakdown of what to expect in your area:  

DeKalb County

Winter Weather Advisory continues through 9 a.m. Wednesday. Anywhere from 2 to 3 inches of snow is expected late Tuesday afternoon through Wednesday morning. Total ice accumulations of one tenth to two tenths of an inch are possible. 

LaSalle County

A Winter Weather Advisory continues through 9 p.m. Tuesday. The advisory warns of freezing rain expected and total ice accumulations of one tenth to two tenths of an inch expected. 

Lake County

A Winter Weather Advisory continues through noon Wednesday. Anywhere from 3 to 5 inches of snow is expected through Wednesday morning with ice accumulations of up to a tenth of an inch possible. 

Kane, DuPage and Cook Counties

A Winter Weather Advisory continues through midnight. The alert warns of mixed precipitation that could bring an estimated 1 inch of snow, possibly up to 3 inches across northern Kane County, and ice accumulations of up to two tenths of an inch. 

Kendall, Grundy, Will and Kankakee Counties in Illinois and Lake, Porter, Newton and Jasper Counties in Indiana

The alert ends at 9 p.m. Tuesday. Freezing rain is expected with ice accumulations of one tenth to two tenths of an inch expected.  



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