Chicago, Illinois – Periods of impactful lake-effect snow are expected to develop Friday and continue into Saturday across parts of northeast Illinois and northwest Indiana, with localized heavy snowfall creating dangerous travel conditions.
According to the National Weather Service in Chicago, lake-effect snow bands are likely to form early Friday morning and intensify at times through Saturday. Snowfall rates could exceed one inch per hour in the most persistent bands, leading to rapid accumulation and sharply reduced visibility.
Forecasters say an initial band of snow may push well inland across northern Illinois on Friday, with the longest duration and heaviest snowfall expected closer to Lake Michigan. By Friday night into Saturday, the focus of the most intense lake-effect snow is expected to shift into northwest Indiana, though some bands may still brush portions of northeast Illinois before gradually weakening.
Travel impacts are most likely along major corridors including Interstate 90, Interstate 94, Interstate 80, and Interstate 294, where snow-covered roads, sudden whiteout conditions, and slick pavement could develop quickly beneath heavier snow bands. Gusty snow showers or squalls may also form, further increasing travel hazards.
The NWS cautions that exact placement of the heaviest snow remains uncertain, as lake-effect events can shift rapidly depending on wind direction. As a result, some communities may see limited impacts while nearby areas experience much more severe conditions.
Outside of the lake-effect snow, well below normal temperatures will persist through the weekend, allowing snow to accumulate efficiently and linger on untreated roads.
This forecast is especially important for commuters, overnight travelers, delivery drivers, and weekend travelers moving between Illinois and Indiana.
Residents are urged to closely monitor forecast updates, be prepared for rapidly changing conditions, and consider adjusting travel plans during the height of the lake-effect snow Friday and Saturday.
