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The 1883 Rochester tornado was an F5 (estimated) tornado that hit Rochester, Minnesota on August 21, 1883. The tornado was one in a series of tornadoes that hit Southeast Minnesota on that day, causing at least 37 deaths and over 200 injuries, and it was the impetus for the creation of the Mayo Clinic.〔(【引用サイトリンク】 publisher=NOAA )〕 On July 21, two other tornadoes struck the area. An F4 tornado was one of a family of tornadoes that killed 4 people near Dodge Center (15 miles west of Rochester), and an F2 tornado devastated Elgin, northeast of Rochester. ==The outbreak== According to Joseph Leonard as written in ''History of Olmsted County, Minnesota'', Although meteorology in 1883 was primitive compared with modern science, Leonard's observations reveal quite a bit about the atmospheric conditions in Rochester that day. High temperatures, high humidity, strong surface winds, and vertical wind shear appear to have all been present, and all are key factors in the development of thunderstorms and tornadoes. The Rochester tornado was one of at least 3 violent tornadoes that hit southeastern Minnesota that day, but because the Rochester twister was so devastating, the other two were largely ignored by the press and relatively little is known about them. * The first tornado touched down at 3:30 PM just south of Rochester near Pleasant Grove. This tornado was approximated at an F3, and it killed 2 people and injured 10. * The second tornado was the large F5 that made a direct hit on Rochester. It touched down at 5:30 PM near Hayfield, traveling before lifting back up after it hit Rochester. It killed 37 and injured over 200, mostly in Rochester.〔(【引用サイトリンク】publisher=NOAA )〕 Forty farms were hit and at least 10 were leveled, some with homes swept away. A metal railroad trestle was completely destroyed, and a wooden plank was driven through the trunk of a tree. The northern third of Rochester was devastated, with 135 homes destroyed and 200 damaged.〔http://www.crh.noaa.gov/arx/?n=aug211883photos〕 * The third tornado, approximated at an F2, touched down at 8:30 PM just to the east of Rochester near St. Charles. It killed 1 person and injured 19.〔(【引用サイトリンク】 publisher=NOAA )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1883 Rochester tornado」の詳細全文を読む スポンサード リンク
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