Audi RS488,073 Locked 03 Dec 2022 03 Dec 2022
Create a new Grand Pris race. For the weather choose Custom, then below select to create a Custom Weather scenario. Make any desired changes in there, then go back and proceed with the race. I had selected a short 3 lap race in a Williams car. Finish the race and you will receive the achievement after you click to proceed after the results window. I won the race, but that shouldn't be required.