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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]
Storm spotters are required because radar systems such as NEXRAD detect signatures that suggest the presence of tornadoes, rather than tornadoes as such. [114] Radar may give a warning before there is any visual evidence of a tornado or an imminent one, but ground truth from an observer can give definitive information. [115]
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 ...
The 3D structure of the tornado has been analyzed in a 2005 article in the Journal of the Atmospheric Sciences by Wen-Chau Lee and Joshua Wurman. [17] In 2024, it was published that the radar did measure winds of approximately 257 mph (414 km/h) approximately 30 m (98 ft) above the radar level. [11] F5 May 3, 1999: Bridge Creek, Oklahoma
Radar imagery of the tornadic supercell that was producing the EF3 Valley View tornado as it moved eastward after passing south of Valley View. The tornado maintained high-end EF2 intensity as it crossed I-35 at the Lone Oak Road/FM 3002 interchange south of Valley View, tossing multiple cars and tractor-trailers off the interstate. On the east ...
The tornado was the first of two EF4 tornadoes during the tornado outbreak of April 25–28, 2024. The tornado reached peak intensity in the neighborhood of Elkhorn and south of the city of Blair, leading the National Weather Service in Omaha, Nebraska to assign a rating of low-end EF4 on the Enhanced Fujita scale , with maximum wind speeds ...
A Doppler on Wheels radar loop of a hook echo and associated mesocyclone in Goshen County, Wyoming on June 5, 2009.Strong mesocyclones show up as adjacent areas of yellow and blue (on other radars, bright red and bright green), and usually indicate an imminent or occurring tornado.
By this time, a tornado emergency had been issued for the eastern portions of Columbia as a debris ball was evident on radar and storm spotters reported a large, significant tornado on the ground. NEXRAD radar scan of the Columbia, Tennessee EF3 tornado. The tornado then weakened some to EF2 intensity as it approached and then crossed I-65 ...
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