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The 2011 Super Outbreak was the largest tornado outbreak spawned by a single weather system in recorded history; it produced 367 tornadoes from April 25–28, with 223 of those in a single 24-hour period on April 27 from midnight to midnight CDT, [4] [11] fifteen of which were violent EF4–EF5 tornadoes. 348 deaths occurred in that outbreak, of which 324 were tornado related.
The tornado reportedly killed three people, and passed through the villages of Welbourn, Wellingore, Navenby and Boothby Graffoe in Lincolnshire, and leveled large portions of each village. It is the strongest tornado on record in the British Isles. [150] This tornado is not documented by the European Severe Storms Laboratory. Jun 17: 1946 ...
The biggest tornado outbreak on record—with 353 tornadoes for just 3 + 1 ⁄ 2 days (including four EF5 and eleven EF4 tornadoes)—occurred starting on 25 April 2011 and intensifying on April, 26, and 27 (a record-breaking day), before ending on 28 April 2011, now referred to as the 2011 Super Outbreak.
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]
From powerful hurricanes and tornadoes to drought-busting storms and the deadliest wildfire in the United States in more than a century, here are the most unforgettable weather events of 2023.
New mobile radar data shows that wind speeds in the recent Greenfield tornado passed 300 mph. Scientists say it's rare.
Prior to 1950 in the United States, only significant tornadoes are listed for the number of tornadoes in outbreaks. Due to increasing detection, particularly in the U.S., numbers of counted tornadoes have increased markedly in recent decades although the number of actual tornadoes and counted significant tornadoes has not. In older events, the ...
It's well known as one of the strongest tornadoes to ever be recorded in history," Timmer said. On June 24, 2003, an F4 tornado destroyed the community of Manchester, South Dakota , touching down ...