Chicago is under a Winter Storm Warning as an intense lake-effect snow event threatens to dump significant snowfall across the area from Sunday night into Monday. The National Weather Service has issued alerts covering parts of northeastern Illinois and northwest Indiana, warning residents to brace for hazardous conditions. This early-season storm could become the first major Chicago snow of the season – and notably, Chicago’s first November Winter Storm Warning in seven years – offering an unexpected preview of how quickly the weather in Chicago can turn wintry.
After a light slushy coating in parts of the region early Sunday, forecasters warn the worst is yet to come. The National Weather Service and local meteorologists expect the heaviest snow to develop late Sunday night and peak during the Monday morning rush hour. Snowfall rates may reach 2 to 3 inches per hour at times under the most intense bands. With strong northerly winds gusting up to 30–35 mph, blowing snow could produce near-whiteout conditions. In some spots, visibility will drop suddenly as bands of lake-effect snow set up, making travel difficult or even dangerous. A few communities along the Lake Michigan shoreline and parts of northwest Indiana could be buried under a foot or more of snow by Monday afternoon, depending on where the persistent snow bands hover.
Authorities have placed several counties under winter storm alerts. A Winter Storm Warning is in effect from Sunday 9 p.m. until midday Monday for Chicago’s Cook County and areas to the south and east, including eastern Will and Kankakee counties in Illinois, as well as Lake and Porter counties in Indiana. Neighboring areas west of Chicago, like DuPage and western Will County, are under a Winter Weather Advisory for lighter snow amounts. Lake County, Illinois, has been under a Winter Storm Watch as officials monitor whether the most intense lake-effect snow will extend that far north. Wherever the heaviest snow bands stall, officials caution that this could turn into a “very dangerous and life-threatening situation” with travel not advised during the worst conditions.
Even thunder and lightning could accompany the snowfall – a phenomenon known as thundersnow – if the storm’s energy is high enough. By Monday afternoon, the snow is expected to taper off as the lake-effect machine winds down. Plows and salt trucks will be out in force, but drivers are urged to use extreme caution or avoid travel during the Monday morning peak of the storm. The Winter Storm Warning remains in place through Monday, and schools or workplaces could see delays if roads become impassable.
According to the Chicago weather forecast, conditions should gradually improve after this burst of wintry weather. Once the storm passes, temperatures are projected to rise into the 40s by Tuesday and even milder later in the week. The brief blast of snow and cold will give way to calmer, more typical November weather in Chicago, allowing the city to dig out and return to normal.
