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Most UK tornadoes are T6 or below with the strongest known UK tornado estimated as a T8 (the London tornado of 1091). For comparison, the strongest detected winds in a United States tornado (during the 1999 Oklahoma tornado outbreak) would be T11 using the following formulas: v = 2.365 (T+4) 3/2 m/s v = 8.511 (T+4) 3/2 km/h v = 5.289 (T+4) 3/2 mph
In Canada, tornadoes are rated based on the damage they cause using a set of "Damage Indicators" which estimate wind speeds based on different levels of damage. Before April 1, 2013, the scale used to rate tornadoes in Canada was the Fujita scale. Following this day, Environment Canada started to use the Enhanced Fujita scale. [2]
Less than 5% of tornadoes that occur in Canada are rated as F3/EF3 or higher. The only officially rated F5/EF5 tornado in Canada is the 2007 Elie Tornado , however Thomas P. Grazulis of The Tornado Project has unofficially rated the 1920 Alameda-Frobisher Tornado and the 1935 Benson Tornado as F5 (neither having any official intensity ratings ...
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.
Canada's tornado season once again proved to be hyperactive in 2022, with 117 tornadoes recorded for the second year in a row, equaling the country's highest number on record. While documented ...
This page documents all tornadoes confirmed by Environment Canada and the University of Western Ontario's Northern Tornadoes Project (NTP) in Canada throughout 2023. Based on statistical modelling by Sills et al. (2012), an average of 230 tornadoes likely occur across the country each year; however, only 61 of these are actually documented annually based on 1980–2009 averages. [1]
This page lists tornadoes and tornado outbreaks which have touched down in Canada prior to the 21st century.On average, there are around 80 confirmed and unconfirmed tornadoes that touch down in Canada each year, with most occurring in the southern Canadian Prairies, Southern Ontario and southern Quebec.
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