USAC West Coast Sprint Cars Rained Out at Tulare Thunderbowl Raceway, United States Auto Club, USAC West Coast Sprint Car Series From USAC TULARE, Ca. (March 10, 2018) – Saturday night’s USAC West Coast Sprint race at the Merle Stone Chevrolet Thunderbowl Raceway has been cancelled due to weather. The series resumes March 24 at Ventura (Calif.) Raceway.