Today will begin mostly sunny, but clouds will increase in the late morning and early afternoon. Showers and thunderstorms are expected to develop across central and eastern Ohio as moisture spreads up from the south, but the coverage of showers should be scattered. The chance of rain at the track today is around 30%, and any showers that may occur should be brief, so there should be plenty of dry track time for practice sessions.
The chance of rain rises on Friday as there will be a cold front approaching from the west that will result in greater coverage of showers and storms in the afternoon. Expect the timing of storms on Friday to be 2 pm or later, so the qualifying sessions could be impacted. If a storm occurs at the track, it could produce a quick quarter of an inch of rain, in addition to cloud-to-ground lightning. Those at the track will need to stay weather-aware and take shelter when thunder is heard.
The front is expected to move through Friday night, and drier air will build in behind it. This should give a nice day for racing on Saturday, with partly cloudy skies and highs in the upper 70s.