Years ago flying PIT/FLL on USAir. Thunderstorms rolled into FLL so we divert to MIA. We sit on the ground for about an hour, then refuel and get released. As soon as we take off thunderstorms roll back into South Florida so we divert this time to RSW. Sit on the ground there for about an hour then take off. Then thunderstorms role in again and we circle the Everglades for about 30 minutes before landing. Entire time circling around South Florida and sitting on the ground over 4 hours.