Jordan Iowa Tornadoes June 13, 1976

The 13 June 1976 Jordan Iowa F5 tornado was a unique event, both because of its intensity, described by Ted Fujita at the time as the most intense he had ever studied, and because the F5 cyclonically-rotating tornado was accompanied for 25 minutes by an anticyclonically-rotating F3 tornado that took a parallel path shown in the last part of the video.