Wednesday will be a beautiful day with southerly winds bringing mild temperatures in the lower 70s, and mostly sunny skies.
Scattered rain showers are possible in the area on Thursday, and timing is too uncertain at this time to pinpoint a favored time for showers. But it does appear likely that they will remain light and brief, so I don't expect much impact.
Rain showers should be more numerous on Friday as a cold front gets close to Road Atlanta. With rain amounts on Friday expected to be light, I think the racing will be able to continue with wet tires. Timing is also uncertain as models are showing different timing of the frontal passage. The earliest timing pushes it through in the morning, with the latest timing pushing it through Saturday morning. So quite a big difference. The most likely solution is that it will exit by the start of the race on Saturday, and colder temperatures will follow the front. The main event should be dry and mostly sunny, and breezy with a northwest wind at 10 to 20 mph.
I will continue to monitor and update as needed through the week.