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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 DOW documented the largest-ever-observed core flow circulation with a distance of 1,600 m (5,200 ft) between peak velocities on either side of the tornado, and a roughly 7 km (4.3 mi) width of peak wind gusts exceeding 43 m/s (96 mph), making the Mulhall tornado the largest tornado ever measured quantitatively. [3] 1946 Timber Lake tornado
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 ...
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]
With 55 tornadoes in 2024 as of Thursday, Iowa has seen the most tornadoes this year. A graphic from AccuWeather depicting the number of tornadoes each state has seen so far in 2024.
The third most memorable tornado of Timmer's 25-year career was the most powerful he's recalled. On April 27, 2011, an EF5 tornado tore through multiple counties in east-central Mississippi ...
Parts of this article (those related to Number of tornadoes in United States by year and intensity) need to be updated. The reason given is: Numbers need to be updated.. Please help update this article to reflect recent events or newly available information. (August 2024)