Yesterday ended up being dry at the Gainsville airport, although there were some thunderstorms reported within 10 miles. I'm not sure if these affected the track or not. It was certainly sunnier than expected, with the high temperature reaching 81. I expect that there will be much more cloud cover today and cooler as winds will be from the northeast and an upper level low moves closer to the area.
Friday will be cloudy and cool, and it is likely that there will be some light rain or drizzle on and off throughout the day. I don't expect any heavy rain, and rain amounts on Friday will probably be less than a tenth of an inch.
Saturday is a big question mark. There could be some very heavy rain, or very little rain, depending on how Joaquin interacts with the upper level low over the southeast. Joaquin is going to stay well off the coast Saturday, but the question is whether the upper low will pull some it the moisture associated with it far enough west to affect Road Atlanta. Since it appears likely that there will be at least some measurable rainfall at the track on Saturday, I am raising the rain chance to 60%. However, I still expect that the really heavy rainfall is going to stay to the east, mainly over South Carolina. I base this on my experience with these types of weather patterns. But I'm not confident about that, as this is an unusual pattern. I could be completely wrong about this, and there may be very heavy rain and flooding all day. There are still some models that are completely dry, and others show over 5 inches of rain on Saturday.