Good news for campers: it appears the chance for showers and storms overnight are diminishing. Biggest threat is in the southern third of the state.
Now, to Race Day, and the next threat that was on the menu. An approaching frontal system.
IIRC it’s been 10 years since rain shortened a “500.” Storms are expected to fire any time post-noon tomorrow in central Indiana. (Simulation via WeatherBELL.)
There is a marginal risk of severe weather with these storms. (Click to enlarge chart.)
Along with the storm chances, a high in the upper 70s. It will be as least as humid as it was today, but with a bigger breeze, from the southwest at 10-20 mph.