By Doug Schneider
The main change to the forecast today is a higher chance of rain on Sunday. Confidence is increasing that a cold front will move through Wisconsin during the day, and bring numerous showers to eastern Wisconsin. While a shower is possible at any time of the day, the most likely time for showers appears to be in the mid to late afternoon. The WeatherTech Championship race will be from 11:40 am to 2:20 pm EDT, so it may end up being dry. The Lamborghini Super Trofeo race at 2:55 pm EDT has a higher chance of seeing wet conditions. A thunderstorm will be possible, but the chance of one at the track is low. While the rain could get briefly heavy, I think it will be manageable to race in, so I have the Impact as Low. I expect that rain amounts will be between a tenth and a quarter of an inch before sunset on Sunday, but with most of that falling after the end of the scheduled races.