What they've done in years past is to assume the event is a go, have everyone show up at the track, and then hold everyone at the gates if it's raining or threatening until they either proceed or declare it a rainout. They don't schedule a rain date so if it's rained out that's it. Last year on Saturday they lost about an hour getting the track dried and sprayed, but the day was overcast and in the 60's all day long and the cars were flying in the cool air. Lot's of people equaled or improved their personal best et's - Cecil is the quickest track in this area.