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Intensity cannot be determined due to a lack of information. This rating applies to tornadoes that traverse areas with no damage indicators, cause damage in an area that cannot be accessed by a survey, or cause damage that cannot be differentiated from that of another tornado. [4] N/A EF0: 65–85: 105–137 52.82% Minor damage.
Tornado damage to a house in Oklahoma County, Oklahoma, hit during the Tornado outbreak of May 10–13, 2010. Tornado intensity is the measure of wind speeds and potential risk produced by a tornado.
A Waffle House location may close in preparation for an incoming storm for the safety of its customers and employees, which is unrelated to actual storm damage. The intent of the Waffle House Index is to measure how quickly a location reopens after the storm passes. The quicker the reopening, the less overall damage the area sustained in the storm.
More tree, outbuilding, and home damage occurred as the tornado continued to track northeast through rural Oklahoma. The tornado then reached a width of 1,200 yards (1,100 m) as it approached the state line with Arkansas where trees were uprooted before the tornado dissipated after passing over AR 16. [9] EF1 E of Siloam Springs: Benton: AR
An EF4 tornado with wind speeds ranging from 166 to 200 mph can cause devastating damage. Most to all walls on a well-built house will likely collapse, and high-rise buildings can sustain ...
The 1977 Birmingham–Smithfield F5 tornado's damage was surveyed by Ted Fujita and he "toyed with the idea of rating the Smithfield tornado an F6". [13] In 2001, tornado expert Thomas P. Grazulis stated in his book F5–F6 Tornadoes; "In my opinion, if there ever was an F6 tornado caught on video, it was the Pampa, Texas tornado of 1995". [14]
Passing through the small community of Midnight, the tornado produced EF2 damage: a home and a few barns were destroyed, trees and power poles were snapped, a sign was blown over, and a metal building and a small brick building sustained roof damage. The tornado then moved northeast along MS 149, causing EF2 to EF3 damage as it approached ...
This version was based on a 12-step rating scale. Over the next few years, dozens of tornadoes would be rated on this version of the scale. Most notably, the 2021 South Moravia tornado received a rating (IF4) and full damage survey on the IF-scale conducted by ESSL, the Czech Hydrometeorological Institute and four other organizations. [2]