During the late afternoon and early evening of May 15, 1968, five tornadoes (two F1s, one F2, and two F5s) occurred in Iowa. These tornadoes were part of the May 15-16, 1968 outbreak (39 tornadoes) which affected ten states. In Iowa, the tornadoes caused 18 fatalities and 619 injuries. Since this outbreak, no other tornadoes have produced this many deaths or injuries in Iowa. There have only been two other F5 or EF5 tornadoes in Iowa since 1968 (Jordan - June 13, 1976, and Parkersburg - May 25, 2008). The picture above was taken by the Floyd County sheriff (L. L. Lane) at his spotter position on Highway 14. It shows the tornado when it was 2 miles southwest of Charles City.
The links below provide more on this historic outbreak and its affects on Charles City, Oelwein, and Maynard, IA.