CHICAGO (CBS)– A winter storm is ahead Tuesday night and CBS 2 has the First Alert Weather updates you need to prepare.

A WINTER STORM WARNING takes effect at 8 p.m. and continue through Wednesday at 6 p.m. The warning takes effect in Cook, DuPage, Kendall, Grundy, Will, LaSalle, Kankakee counties and all of Northwest Indiana.

Light rain starting Tuesday night will turn into snow later in the evening, between 8 p.m. and 10 p.m.. The heaviest snow will fall from midnight to 6 p.m. Wednesday. Rates could reach one inch per hour at some points.

The heaviest snowfall is expected for Kankakee County and Northwest Indiana with nearly 14 inches of snow expected.

Downtown Chicago and the city’s South Side are more likely to see 4 to 6 inches.

Wednesday morning commuters will be impacted by the snow causing dangerous driving conditions.

Additional snow showers are possible on Thursday, about an inch or two in the city, south suburbs and Northwest Indiana.