On May 29 – 30 , Ames , Iowa , was soaked with between 4 and of rain on already-saturated soil , leading to much of south Ames and the campus of Iowa State University being submerged under several feet of water , and forcing the evacuation of thousands of people . Floodwaters also closed down two major highways : U.S. Route 30 and U.S. Route 69 . Longtime Ames residents said that the flooding was the worst to hit Ames since the Great Flood of 1993
Great Flood of 1993
Great Flood of 1993
Tornado outbreak sequence of May 22–31, 2008