F-5 tornado touches down near Hector Field, the local airport 3 miles northwest of Fargo
On June 20, 1957, a series of 23 tornadoes spawned by a supercell thunderstorm, including a massive F5 twister which leveled 329 homes and killed ten people, struck Fargo, North Dakota. The 9-miles-long, 700-feet-wide monster traveled over 57 miles on a track originating in Albertha, North Dakota and continuing across the state to beyond the Minnesota border. Debris from Fargo was found as far away as Rochert, Minnesota, 54 miles east of the devastated town. Additional damage across the state included 1035 homes, four churches, three schools, and 45 businesses, mostly small shops.
Dr. T. Theodore Fujita from the University of Chicago studied the Fargo tornado extensively. His published work introduced many terms for tornado technology still in use today. In 1971, Dr. Fujita created the F-Scale for rating tornado intensity based on damage to structures and vegetation. At that time, the Fargo tornado was designated with F5 status.
Image Credit: North Dakota State University
Image: National Weather Service, NOAA
On November 7, 1957, ten people were killed and hundreds more injured when fourteen separate tornadoes struck parts of southeastern Texas and southwestern Louisiana in a ten-hour period. Additional tornadoes touched down at the same time in other parts of Louisiana and the southeastern United States, causing death, injuries and destruction on this tragic day in weather history. Despite the relatively small path widths and lengths of the Texas and Louisiana tornadoes, they were large storms as measured on the Fujita scale: an F4 storm hit Orange County, Texas, and several others in the grouping measured F3, including two cutting through Groves, Texas and Alexandria, Louisiana. Total damage was estimated at $5 million dollars (equivalent to about $40 million today).
Only one tornado to date had been deadlier in southeast Texas and southwest Louisiana – the Alexandria tornado of April 4, 1923, which killed 15 people and injured 150. Making this recent tornado outbreak all the more devastating was the fact that it followed so closely on the heels of massive Hurricane Audrey, the deadliest natural disaster in the area of all time, which struck only a little more than four months earlier on June 27th.