Ice by Wednesday morning could cause commute problems
Concerns for slick spots continue tonight through Wednesday morning, especially off towards the north and east as that next system brings more moisture our way. This will be tricky to forecast most because this is all pavement temperature-dependent. However, Cass and St. Joseph counties in Michigan have the best chance to see accumulating ice tonight, which of course could cause big problems for the Wednesday morning commute. Even on the Indiana side, numbers are pretty close to zero, but even a thin glaze can surprise you and make for slippery travel.
So, I'd give yourself about 10-15 minutes of extra drive time for tomorrow morning, especially if you're living north of the state line. For everyone in Indiana, 5-10 minutes isn't a bad idea also from the toll road and highway 30. South of 30, the ice risk drops to zero and it should be a typical commute.
Slick spots will be possible across the toll road, even if you typical commute takes you west to Chicago. The farther south you go, the less ice we'll see so highway 30 should be good to go for the most part.
Now in Michigan, it's a different story. Highway 31 from Niles to Benton Harbor and St. Joe, along with I-94 into Central Michigan, will likely have slick spots. Highway 12 east to Sturgis into St. Joseph will be icy! M-60 in Cass County could also have its fair share of problems by tomorrow as well. So take it easy throughout the Michigan counties, just to be safe tomorrow morning!