The National Weather Service has extended an existing winter weather advisory for all of northern Illinois and northwestern Indiana, with snow expected to rumble through traffic during the morning commute in most places.
Latest indications are that the advisory will go into effect at various times across the region, with 1 to 6 inches of snowfall possible by Wednesday evening, with parts of central Illinois and central Indiana recording the largest accumulations.
The new advisory will take effect at midnight in LaSalle, Kendall, Grundy, Southern Cook, Will and Kankakee counties in Illinois, as well as Lake, Porter, Newton and Jasper counties in Indiana.
Illinois counties will remain under this advisory until 6 p.m., as will Newton and Jasper counties, according to the alert. Areas closer to Lake Michigan, including Indiana’s Lake and Porter counties, will remain under the advisory until midnight Thursday.
While exact snowfall forecasts are still being worked out, the National Weather Service says the highest accumulations will likely occur in central Illinois and Indiana, Lake, Porter and Porter counties. , Newton and Jasper potentially seeing 3 to 6 inches of snow, with some locally higher totals possible.
In Illinois, areas south of Interstate 80 could see between 2 and 4 inches of accumulation, with the morning commute largely impacted by snowfall.
Lake and DuPage counties, as well as northern and central Cook County, will be on the 3 a.m. advisory and will remain under the advisory until 9 p.m.
Those areas closer to the lake could see slightly higher accumulations, with 2 to 4 inches of snow possible.
Finally, McHenry, DeKalb and Kane counties will be on notice from 3 a.m. to 3 p.m. These counties are expected to see less intense accumulations, but road conditions Wednesday morning could still be hazardous.
Wednesday’s snowfall is the first of several disruptions that could bring wintry weather to the region, with another mower system expected to arrive on Friday and several more rounds of snow possible Saturday and Sunday, according to the NBC 5 Storm team. .