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While direct measurement of the most violent tornado wind speeds is nearly impossible, since conventional anemometers would be destroyed by the intense winds and flying debris, some tornadoes have been scanned by mobile Doppler radar units, which can provide a good estimate of the tornado's winds. The highest wind speed ever measured in a ...
The tornado continued to cause significant tree damage until it dissipated north-northwest of Summit at 4:04 a.m. CDT (09:04 UTC). [82] The tornado was on the ground for approximately 37 minutes, traveling a total path length of 21.10 mi (33.96 km), and reaching a peak width of 1,500 yd (1,400 m).
This tornado first struck a warehouse, removing the east end of the building's roof. Eleven empty semi-truck trailers were blown over nearby as well. The tornado tracked southeastward, intermittently damaging trees and power poles in the Cuyahoga Valley National Park. The tornado lifted just before crossing I-80. [39] EF1
The tornado then lifted northeast of the golf course as it crossed KY 329/KY 1694 near Brownsboro as another EF2 tornado was forming to the north. [42] [90] The tornado was on the ground for 14 minutes, traveled 11.59 mi (18.65 km), and reached a peak width of 450 yd (410 m). There were 22 injuries in Jefferson County. [42] [90]
The tornado was rated as a high-end EF3 with wind speeds estimated at 155 mph (249 km/h), reaching a peak width of 1,300 yards (1,200 m) along a 34.64-mile (55.75 km) path, remaining on the ground for 38 minutes. [11] As this tornado was ongoing, a separate circulation spawned the violent Greenfield tornado. [12]
The tornado was the fourth-deadliest of the 1990s in the United States, only being surpassed by the 1990 Plainfield tornado that killed 29, the 1998 Birmingham tornado that killed 32, and the 1999 Bridge Creek–Moore tornado that killed 36. It was the only F5 tornado of 1997, and the next F5-rated tornado would occur on April 8 of the ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...
Tornado Alley, also known as Tornado Valley, is a loosely defined location of the central United States and Canada where tornadoes are most frequent. [1] The term was first used in 1952 as the title of a research project to study severe weather in areas of Texas , Louisiana , Oklahoma , Kansas , South Dakota , Iowa and Nebraska .