Emergency crews were actively responding to dozens of vehicle crashes across Lake and McHenry counties, including numerous school bus crashes, amid wind-driven snowfall.
The National Weather Service (NWS) said a band of gusty snow showers along a strong cold front was moving steadily south across the northern Illinois area as of 6 a.m. Wednesday.
Temperatures were above freezing but quickly falling into the 20s with the snow, resulting in slick spots on roadways.
“Motorists are advised to leave extra time to reach their destinations and be prepared to encounter localized hazardous travel. Take it slow and keep a safe following distance when driving!” the NWS said.
The wind-driven snow was most intense in the heart of the Chicago metro area between 8-9 a.m. with the weather moving into northwest Indiana and the Interstate 57 corridor across far eastern Illinois by around 10 a.m.
An inch of snow was expected in some areas of northern Illinois, resulting in quickly deteriorating travel conditions. Wind gusts up to 40 mph were reported.
Hazardous travel conditions were widespread, especially in Lake and McHenry counties during the morning commute on Wednesday.
The Lake County Sheriff’s Office said heavy snow was falling across Lake County, especially on the east side of the county, and temperatures had dropped below freezing.
“Roads may be slick and visibility reduced. Please slow down, allow extra travel time this morning, and drive safely,” the sheriff’s office said.
The Lake County Division of Transportation said winter is “back in full force” Wednesday morning as snow falls “fast and furious” accompanied by high winds.
“Numerous crashes have been reported. Please take it slow and know that will take extra time to reach your destination. Our plow crews will continue cleanup efforts throughout the day,” the division of transportation said.
Over two dozen crashes were reported simultaneously in Lake County at one point.
The Marengo Police Department said around 6:45 a.m. that road conditions were deteriorating quickly and asked motorists to use caution.
At least six crashes in Lake and McHenry counties — in Gages Lake, Libertyville, Mundelein, Wauconda, Hawthorn Woods and Huntley — involved school buses. None of them appeared to be serious.
The weather service warned that a wintry pattern will continue through at least early next week with regular opportunities for snow, blustery northwest winds and cold temperatures.