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The one change I've made to the forecast is on Sunday. In my initial forecast, I mentioned a cold front moving through the area over the weekend, bringing chance of a sprinkle, but the chance of measurable rain has gone up slightly today. The chance of rain is still pretty low, and the amount of rain I'm expecting is only a couple hundredths of an inch. This should not have much impact on the race, but the timing could be interesting. The front and the showers associated with it are expected during the early afternoon, in the closing hours of the race. There may not be enough rain to even use wet tires, but it may be a challenging decision for teams to make near the end of the race.
I plan to post a detailed forecast on Saturday morning, breaking down the weather through the race. I will also post updates during the race on our X account - @RacecastWx.