The start of Friday morning practice at the AMA Superbike Championship Presented by Parts Unlimited/Suzuki Big Kahuna Nationals @ Virginia International Speedway has been delayed by rain. Today’s forecast, according to weather.com, calls for a 60% chance of scattered thunderstorms, mainly in the morning. The predicted chance for rain on Saturday is 20% and the chance for liquid sunshine on Sunday is 10%. Ambient temperatures and humidity are expected to stay high all weekend.