Thunder Over Louisville, the annual kickoff event of the Kentucky Derby Festival, is an airshow and fireworks display in Louisville, Kentucky. It is by and large held every April, around two weeks previously the primary Saturday in May, or Derby Day. In years where Easter Sunday falls on the generally planned end of the week, Thunder is moved seven days sooner. It is the biggest yearly firecrackers show in North America and started as a major aspect of an opening functions occasion in 1989 with daytime firecrackers. 1990 brought the principal evening time firecrackers occasion. It formally started in its ebb and flow area along the Ohio River in 1991 with firecrackers, and a yearly aviation expo was included 1992.
Thunder by and large begins toward the evening with an aviation expo, trailed by the firecrackers demonstrate beginning at 9:30 PM, alongside a synchronized soundtrack through PA and radio. A normal of 625,000 individuals have gone to every year since 1997, coating the banks of the Ohio River in Louisville, and over the waterway in Jeffersonville and Clarksville, Indiana. Some additionally watch from the waterway on pontoons, docked in positions sold for philanthropy. Eight 400-foot freight ships dispatch the firecrackers, gave by Zambelli Fireworks Internationale, from the two sides of the George Rogers Clark Memorial Bridge Second Street Bridge, and more firecrackers are propelled from the scaffold itself.