The first rain showers on the outer fringes of Delta may reach Charlotte on Saturday morning. These showers are expected to be fairly light, and should not pose too much of an issue for the morning IMSA practice session. Through the rest of the day and the evening, light showers will be possible, but the overall impact on the racing looks low. It may make for some interesting strategy decisions as the on/off rain may allow for the track to dry out between showers. Total rainfall amounts on Saturday are expected to be between a tenth and a quarter inch, but spread out over a 12-18 hour period.
The chance of rain appears higher on Sunday as the remnants of Delta move across Tennessee. Bands of showers will sweep across Charlotte through the day, most likely in the afternoon. It is possible that some of these showers could be heavy, and delay the on-track action. While NASCAR does use rain tires on road courses, there may be times when the rain is too heavy to continue racing. Rain amounts of Sunday are expected to be between a quarter and a half inch. I don't expect thunderstorms to be an issue, and while winds will be in the 10-15 mph range, they should not be a big factor.
I'll be at the Speedway on Saturday, so this is the last update I have planned.