The Brief IndyCar returns to Road America on Sunday, with the race scheduled to begin at 1 p.m. Drivers said possible rain during the race weekend could affect setup, preparation and strategy. The series will return to Wisconsin in late August for races at the Milwaukee Mile. ELKHART LAKE, Wis. - The weather forecast for Sunday's IndyCar race at Road America is a bit concerning, but the forecast for the series as a whole is nothing but sunny.