E.J. Viso posted the fastest lap at Friday's practice for the Indianapolis 500, reaching 229.537 mph before lightning, heavy rain and wind shut things down.
Practice was called off about 2 1/2 hours early as water stood on the straightaway and in pit road.
Marco Andretti, who posted some of the fastest speeds all week, was second-fastest Friday at 228.754 mph. Indy 500 rookie Carlos Munoz, also a regular at the top of the speed charts during the first days of practice, was third-fastest at 228.250, Will Power was fourth at 228.401 and J.R. Hildebrand was fifth at 227.549.
The last day of practice is Saturday morning with Pole Day qualifying in afternoon.