I've been monitoring this one very closely over the last few days. The setup is extremely fascinating, the coldest air will actually be located in Illinois. Therefore, the best chance for accumulating snow will be near the WI/IL border, away from the lake, while areas farther to the north are more likely to see just a mix of rain and snow. The low level thermal profile is also too warm for a widespread snow event, so it is likely that any accumulating snow will only be in a small area, maybe 10-20 miles wide, where the precip is falling heavy enough to mix down cooler air from the upper levels. The best guess on timing is sometime around daybreak Thursday morning. Most areas will see rain starting Wednesday evening changing to a rain/snow mix early Thursday morning. Everything should be gone by noon Thursday. My forecast is for less than 1" except for the small unknown area somewhere south of I-94 that *might* get 3 or 4 inches (before quickly melting due to the warm ground). Definitely a fun/unique but challenging forecast, I am excited to see if it will pan out.