Click the forecast images to enlarge
There are still some timing differences among the models, but I expect that the window for showers and thunderstorms to arrive will be between 7 pm and 10 pm - the last few hours of the race. There is still a potential for a lightning delay, depending on whether a storm tracks close enough to the track, but the risk appears lower than with previous forecasts. The threat of strong wind gusts and heavy rain has also decreased, but again, the threat will depend on whether a storm moves directly over the track. With coverage expected to be scattered, they could miss the track completely.
I'll try my best to post radar updates during the race on our Twitter account - @RacecastWx.