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In October 2024, Moriarty analyzed the tornado's damage in comparison to non-EF5 tornadoes. Moriarty noted how telephone poles were barely leaning only 80 yards (73 m) away from one of the locations which received an EF5 rating, which was similar to why the 2014 Mayflower–Vilonia tornado was only rated EF4 and not EF5 due to nearby small ...
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]
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 old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.
The Super Tuesday outbreak of Feb. 5-6, 2008, had the most tornadoes for a single February event, with 86 confirmed over 10 states responsible for 57 tornado-related deaths. Five tornadoes were ...
Comparison shows seasonal variability for record increases. ... 34 F3, and 34 F2 tornadoes on April 3–4, 1974. ... (assuming a standard lapse rate) ...
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 ...