(ABOVE: Radar estimates of the rain totals from 9/21/09. The heaviest rain is indicated by the yellow blob which is near Interstate 44)
3-6"+ inches of rain fell in Tulsa on the afternoon of September 21, 2009. Drivers met high water at underpasses, and lots of cars flooded at intersections where the ditches turned into rivers. The highest "official" totals was 5.2" at the Tulsa NWS office which is located near Highway 169 and Interstate 44. KJRH/Channel 2 received 4.6" here in the Brookside area.
How much rain has fallen on a particular day in Tulsa? Try this link of "F6" data from the Tulsa NWS:
Stay dry! George