Thursday is still going to be a picture perfect day for on track activity weather-wise. There may be a few extra stray clouds floating around than first thought, but zero chance of rain. Highs should easily reach the middle 80s.
Friday, with the formation of the subtropical low, you may notice a slight increase in the wind speed from what Thursday offered. Other than that, not much different at all. Mostly sunny skies and highs in the middle 80s. I will say a slight chance of a passing shower or small thunderstorm just to be on the safe side. It will probably not happen, but a stray storm could move in from the coast from the subtropical low.
Saturday will almost be a carbon copy of Friday. Mostly sunny skies with highs in the lower to middle 80s. Only a slight chance of rain again due to the subtropical low hanging around on the coast.
As of right now, models are keeping most of the rainfall confined to the eastern-most counties of Georgia (NAM valid at 2PM EDT, bottom left picture). Models usually do not handle the tropical moisture as well as a frontal system, and that is why I am going with a slight chance of showers or a thunderstorm on Friday and Saturday. Definitely not a rain-out, and may be completely dry. Take an umbrella just in case. Radar will be available on our site just in case this system does develop. Get the latest updates by following my Twitter feed @RaceWx4You and our Facebook page.