Wednesday continues to look like a beautiful day, with warm temperatures in the lower and mid 70s under mostly sunny skies.
On Thursday, clouds will increase, along with the chance of rain. I expect to see on/off light showers at times throughout the daytime hours, but they might be more numerous in the afternoon. While an isolated thunderstorm cannot be ruled out, I think the chance of one at the track is low. On Thursday night, heavier showers will be possible along a cold front, which is most likely to pass through the area between midnight and 4 am. The chance of rain will likely end once the front passes. However, The models still have some slight timing differences, and so I still kept a slight chance of showers in for early Friday morning (around or before sunrise). The rest of Friday should be very nice, with clouds clearing out and high temperatures in the mid 60s.
Saturday will be noticeably colder as a second cold front will bring a surge of cold air from the northwest. Highs will only reach into the 50s, and winds will be brisk, from the northwest at 10 to 20 mph. If you're at the race on Saturday, don't forget to bring a coat!