So what will be impacts be for Road Atlanta? First, don't focus on the exact track of Michael. The track isn't going make a huge difference in the impacts, because tropical moisture will be spreading across Georgia ahead of it, producing a lot of rain. The intensity rating of Michael won't matter much either, as heavy rain will be the main impact at the track, with wind being a lesser impact. The amount of rain that will fall remains uncertain, but here's what the forecast for the NWS' Weather Prediction Center shows:
The rain from Michael will be around the track from Wednesday through Thursday, but right now it appears that the heaviest rainfall will be Wednesday night, with decreasing rain amounts through Thursday as the system pulls away and a cold front moves through.
Behind that cold front, high pressure will be building into the Southeast, and the weather looks great for Friday and Saturday. With the departing low of the remnants of Michael and the building high pressure, Friday will be a little breezy. Temperatures and humidity levels will be quite comfortable, with highs in the lower to mid 70s both days, and lows in the 50s.