Traffic
Illinois Thanksgiving: 'Micro Blizzards' Could Hit Chicago, IL
Chicago, IL – Imagine heading west on Interstate 80 for Thanksgiving, traveling through the Chicago suburbs toward Joliet when a wall of blowing snow suddenly sweeps across the highway. Within moments
By Natalie Brooks · 2026-11-14T11:11:56.266Z
Chicago, IL – Imagine heading west on Interstate 80 for Thanksgiving, traveling through the Chicago suburbs toward Joliet when a wall of blowing snow suddenly sweeps across the highway. Within moments, semitrailers disappear into the whiteout, brake lights become difficult to see and a routine holiday drive turns dangerous. It's the kind of sudden winter weather Illinois motorists should prepare for as Thanksgiving approaches Thursday, Nov. 26.
According to the National Weather Service NWS , these intense bursts of snowfall, officially called snow squalls and sometimes described as "micro blizzards," can produce gusty winds, near zero visibility and rapidly deteriorating road conditions.
Unlike prolonged winter storms, snow squalls can develop quickly, leaving motorists little time to react.
Illinois Highways Where Sudden Whiteouts Are a Concern Interstate 80, stretching through the southern Chicago suburbs, Joliet, Morris and Ottawa, is a major Thanksgiving travel corridor where sudden winter weather can create hazardous driving conditions.
Interstate 90 through Chicago, Elgin and Rockford, Interstate 94 near Chicago and Lake Michigan, and Interstate 55 connecting Chicago, Bloomington and Springfield also face winter driving risks.
Interstate 57 through Kankakee and Champaign, Interstate 39 near Rockford and LaSalle, and Interstate 74 across central Illinois are additional routes where heavy snowfall and blowing snow can threaten motorists.
Drivers traveling through Cook, Will, Kankakee, Grundy, LaSalle, Winnebago and McHenry counties should monitor changing forecasts, particularly when snow showers and gusty winds are possible.
Exposed highways across northern and central Illinois can experience rapidly changing visibility, while areas near Lake Michigan face additional lake effect snow hazards.
Lake effect snow bands are not necessarily snow squalls, but both can create dangerous highway conditions.
What Happens When a Snow Squall Warning Is Issued? The NWS issues Snow Squall Warnings when dangerous snow squalls are occurring or imminent.
Warnings typically last 30 to 60 minutes and may activate Wireless Emergency Alerts on compatible mobile phones.
Sudden whiteouts at interstate speeds can increase the risk of multivehicle crashes, particularly when motorists brake abruptly or follow too closely.
What Thanksgiving Travelers Should Do If a Snow Squall Warning is issued, the safest option is to delay travel until conditions improve .
Drivers already traveling should gradually reduce speed, increase following distance, activate low beam headlights and avoid sudden braking.
If visibility deteriorates, safely exit the highway when possible rather than stopping in an active travel lane.
Before departing, motorists should check Getting Around Illinois for highway conditions and NWS Chicago , NWS Lincoln or NWS Quad Cities for official forecasts and warnings covering different portions of Illinois.
This is a Thanksgiving travel preparedness reminder, not a prediction that snow squalls will strike Illinois during the holiday. Recognizing how quickly dangerous winter conditions can develop could help motorists make safer travel decisions as Thanksgiving approaches.