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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]
Four of these tornadoes' ratings would be called in to question—three were officially rated F4 and one was rated F2—with many believing that the event was significantly underrated. A violent stovepipe tornado struck the city of Pampa, Texas after touching down to its southwest. Its short path length and lack of damage to structures limited ...
In late 2023, American meteorologist and tornado expert Thomas P. Grazulis created the Outbreak Intensity Score (OIS) as a way to rank tornado outbreaks. [1] [2] For the score, only significant tornadoes are counted: F2/EF2 tornadoes receive 2 points each, F3/EF3 tornadoes receive 5 points each, F4/EF4 tornadoes receive 10 points each, and F5/EF5 tornadoes receive 15 points each. [1]
In the U.S., F0 and F1 (T0 through T3) tornadoes account for 80% of all tornadoes. The rate of occurrence drops off quickly with increasing strength—violent tornadoes (F4/T8 or stronger), account for less than one percent of all tornado reports. [6] Worldwide, strong tornadoes account for an even smaller percentage of total tornadoes.
The National Weather Service's arrow showing the EF scale. This includes a description word for each level of the scale. The Enhanced Fujita scale (abbreviated as EF-Scale) is a scale that rates tornado intensity based on the severity of the damage they cause.
Employees of The Sweet Shop candy factory inspect the wreckage the day after a tornado on March 28, 2000, in Fort Worth. The F2 twister crushed homes in the Linwood neighborhood and pummeled a ...
These tornado outbreaks had their strongest tornado rate as an F2 on the Fujita scale or an EF2 on the Enhanced Fujita scale. Subcategories This category has only the following subcategory.
This tornado was the first in the United States to be caught on film and was also one of the most photographed tornadoes in Oklahoma at the time. Grazulis rated the second tornado, which destroyed several barns before dissipating west of Corn, F2 and noted that it may have been anticyclonic. Grazulis: June 27: 1951 United States: Illinois: Heman: 0