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The old ratings and new ratings are smoothly connected with a linear formula. The only differences are adjusted wind speeds, measurements of which were not used in previous ratings, and refined damage descriptions; this is to standardize ratings and to make it easier to rate tornadoes which strike few structures.
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]
The Xenia, Ohio, F5 tornado of April 3, 1974.This was one of two tornadoes to receive a preliminary rating of F6, which was downgraded later to a rating of F5. [1]This is a list of tornadoes which have been officially or unofficially labeled as F5, EF5, IF5, T10-T11, the highest possible ratings on the various tornado intensity scales.
Lastly, an EF5 tornado, the highest rating a tornado can receive, can create an incredible amount of damage. Wind speeds in an EF5 are in excess of 201 mph. Trees can be debarked with only stubs ...
EF4 damage to a residence from the 2011 Tuscaloosa–Birmingham tornado The Windsor–Tecumseh Tornado of 1946 F4/EF4 Tornadoes in the United States 1950–2019. This is a list of tornadoes which have been officially or unofficially labeled as F4, EF4, IF4, or an equivalent rating.
What does the EF rating for tornadoes mean? The Enhanced Fujita scale is what the EF stands for in the ranking of tornadoes. The scale measures the strength of a tornado based on the damage it caused.
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]
An EFO tornado rating, based on the Enhanced Fujita Scale, has winds between 65 to 85 mph. The rating is determined by estimated wind speeds and related damage. The highest is an EF5 with winds ...