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Edmonton tornado. The Edmonton tornado of 1987, an event also known as Black Friday to Edmontonians, was a powerful and devastating tornado that ripped through the eastern parts of Edmonton, Alberta, Canada and parts of neighbouring Strathcona County on the afternoon of Friday, July 31, 1987. It was one of seven other tornadoes in central ...
Of the average 60 confirmed tornadoes each year, Alberta and Saskatchewan both average between 14 and 18 tornadoes per season, followed by Manitoba and Ontario with normally between 8 and 14 tornadoes per season. Quebec is another recognized tornado-prone zone averaging between 4 and 8 tornadoes each year.
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 due to their age). The deadliest tornadoes in Canadian history were the 1912 ...
The tornado cut a 31.7 km (19.7 mi) path through the forest reaching a maximum width of 2.4 km (1.5 mi), the widest tornado in Canadian history. [287] June 10 - eleven tornadoes were confirmed across Ontario, with ten tornadoes, and Quebec, with one tornado, after powerful storms
From April 25 to 28, 2024, a very large, deadly and destructive tornado outbreak occurred across the Midwestern, Southern, and High Plains regions of the United States, primarily on April 26 and 27. [3] On April 26, the Storm Prediction Center (SPC) first issued an enhanced risk for the Plains, as a broad upper-trough moved eastwards, with ...
Tornado counts are considered preliminary until final publication in the database of the National Centers for Environmental Information. [1] Based on the 1991–2020 average, about 39 tornadoes are typically recorded across the United States during January, about 36 tornadoes are recorded in February, and about 80 tornadoes are recorded in ...
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]
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin, an unofficial, high-end classification of tornado warning—sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ...
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