These Are Iowa’s Worst Tornado Outbreaks
The tornado outbreak of May 15th, 1968 was the worst outbreak of such weather in Iowa's recorded weather history. Between mid-afternoon and early morning on the 16th, there were a total of 39 tornadoes over 19 states. In Iowa, there were five tornadoes (two F1s, one F2, and two F5s) that caused 18 deaths and over 600 injuries.