Some pop-up afternoon showers and thunderstorms will be possible on Friday, mainly near the higher terrain to the west of Danville. They will be moving east, but the chance of one of them reaching VIR before the end of the day's sessions is unlikely.
A passing trough and cold front are likely to bring showers and thunderstorms overnight and into early Saturday morning. There is a chance that some of the morning sessions could be impacted by these showers, possibly the GT qualifying from 8:30 to 9 am, and possibly the GT4 Sprint race at 9:25 am. Through the rest of the day, clouds will clear out and it will be mostly sunny, with high temperatures around 90 degrees.
Drier air behind the departing trough will keep Sunday dry and sunny, with a high temperature around 90 again.