35 years ago today was a stormy day never to be forgotten in the midwest United States: Amazon.com: David Von Pein's review of The Wrath of God - Super Outbreak Tornadoe... April 3, 1974 - The Tornado Super Outbreak http://www.hometheaterforum.com/htf/...-3-1974-a.html The Xenia, Ohio, twister (pictured below) turned out to be the most deadly of the tornadoes to strike that day (April 3, 1974). The fierce half-mile-wide Xenia funnel, which struck at 4:42 PM local time, killed 33 people, while injuring 1,150 more. Approximately half the town was either completely destroyed or badly damaged by the wrath of the incredible "F5" twister. ("F5" being the most powerful and potentially destructive on the "Fujita" tornado-measuring scale.) The official "Fujita" definition of an F5 twister indicates the following --- "F5 Tornado: Wind Speed: 261-318 MPH; producing 'Incredible Damage'. Strong frame houses leveled off foundations and swept away; automobile-sized missiles fly through the air in excess of 100 yards; trees debarked; steel re-inforced concrete structures badly damaged. Incredible phenomena will occur. F5 Relative Frequency: Less than 1% of all recorded tornadoes." In theory, it is believed that an "F6" category of tornado could exist, but no F6 storms have ever been officially recorded (to date). Interestingly, the official Fujita description of a potential "F6" storm is classified in the "Inconceivable" category (with winds of 319-379 MPH). Xenia is located 16 miles west of Dayton, Ohio, and has a population of about 25,000. There were nine churches, four schools, and 1,333 homes and businesses destroyed. The total cost of the damage sustained to the town was estimated to be approximately 100 million (circa 1974) dollars. The F5 monster that annihilated Xenia stayed on the ground for 32 miles and lasted nine minutes, which is nearly twice as long as a normal tornado. The clean-up lasted three months. The 32-mile duration of the Xenia funnel, however, did not establish the record-high for "consecutive length on the ground" that April day. A twister that tore through Monticello, Indiana, remained on the ground for an incredible 121 miles before finally dissipating. That "F4" tornado killed 19 people and injured more than 360 others. SOME TORNADO TRIVIA: Nine years prior to the 1974 "Super Outbreak", the midwest U.S. experienced a precursor to the '74 storms when more than 50 tornadoes ripped through the middle U.S. states, killing better than 250 and injuring thousands more. That spate of twisters was known as the "Palm Sunday Outbreak", occurring on Palm Sunday, April 11, 1965. The all-time record for the deadliest single tornado in United States history belongs to the so-called "Tri-State Tornado", which killed an almost unbelievable 695 people in Missouri, Illinois, and Indiana, on Wednesday, March 18th, 1925. That amazing twister kept the same heading (NE 63 degrees) for 183 miles of its 219-mile path. The tornado travelled at an average speed of 62 MPH, setting still more records for both speed and path length. After the "Tri-State" twister moved into Illinois, the storm was at its worst. In Gorham, Illinois, 34 were killed as nearly 100% of the town was destroyed. Between Gorham and Murphysboro, the record for "fastest tornado ground speed" was broken as the relentless funnel cloud barrelled across the ground at 73 miles-per-hour! The tornado arrived at Murphysboro, Illinois, at 2:34 P.M., killing a staggering 234 people, breaking yet another record (the most deaths in one U.S. city from a single tornado). Damage in Murphysboro exceeded 10-million (1925-era) dollars. The incredible "Tri-State Tornado" was part of a larger tornado outbreak on that March day way back in 1925, an outbreak which included eight tornadoes that killed an absolutely-incredible total of 747 people, making it (to date) by far the deadliest multi-tornado outbreak on record. And it's a record that's not likely to ever be topped. God willing, it never shall. A 140-page book, first published in March 1992, focuses solely on that 1925 monster twister ("The Tri-State Tornado: The Story Of America's Greatest Tornado Disaster").