However, there will be a cold front approaching the area later on Saturday, which could bring another chance of rain in the afternoon. There is still some uncertainty about this round, as the models disagree on the location of where storms will develop in the afternoon and the speed of the front. One models that is faster with the front (NAM) keeps showers south of the area, mostly in Pennsylvania, while another is slower (GFS) and develops showers right over the Finger Lakes area. I am going to keep my forecast of scattered showers going unchanged. It's probably a 50/50 shot at seeing rain at the track on Saturday. If a shower does pass over the track, between a tenth and a quarter inch of rain can be expected, and there may be lightning in the area which could cause a brief delay.
By sunset Saturday, the front should be through the area, and winds will shift to the northwest, Cooler temperatures will follow on Sunday, with partly cloudy skies and highs in the mid 70s. It should be a nice day to enjoy the Six Hours. There will be a good breeze from the northwest at 10 to 15 mph most of the time, with gusts to around 20 mph at times.