At this point, I will push the rain chances up to 20% during the late morning through the afternoon hours on Friday, with partly to mostly sunny skies. I'll keep those rain chances around the same for Saturday, mainly for mid-morning through the afternoon. Unfortunately, I will be bumping those rain chances up to 60% throughout the day on Sunday with partly to mostly cloudy skies.
I'm crossing my fingers that lightning won't be too big of an issue on Sunday. If lightning is detected close by to the track, there will be an announcement made by the track for fans and competitors to seek shelter until the storms have passed. For now, the WPC office is keeping the heavier precipitation well north and northwest of the track, so it looks like for now rainfall may just be a small inconvenience. More updates to come.