By Scott Martin.
The Friday forecast update is out for the IMSA Continental Tire Road Race Showcase at Road America, and weather will be great today with mild temperatures in the mid-70s. Saturday will be much warmer with plenty of sunshine, with highs near 90 degrees. Sunday will continue to be warm with mostly cloudy skies and a very small chance (20%) of an isolated shower or storm during the morning hours. High tops out in the upper 80s.