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Illinois has had large tornado outbreaks in the past, including the tornado outbreak sequence of December 18–20, 1957 and the 1967 Oak Lawn tornado outbreak. Illinois is vulnerable to tornadoes with an average of 35 occurring annually, which puts much of the state at around 5 tornadoes per 10,000 square miles (30,000 km 2) annually. [1]
1975 Canton, Illinois, tornado; Marion, Illinois, tornado outbreak; 1990 Plainfield tornado; June 1990 Lower Ohio Valley tornado outbreak; Tornado outbreak sequence of May 6–27, 1995; List of tornadoes in the May 1995 tornado outbreak sequence; Tornado outbreak sequence of April 1996; Tornado outbreak of April 15–16, 1998; List of tornadoes ...
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.
Deadliest tornado in New Jersey history. Great Natchez Tornado: May 7, 1840: Southeastern United States >1: 317+ fatalities, 109+ injuries: Second-deadliest tornado in U.S. history September 1845 New York outbreak: September 20, 1845: New York, Vermont >5 – Multiple long-track tornadoes crossed upstate New York
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 Xenia, Ohio, F5 tornado of April 3, 1974.This was one of two tornadoes to receive a preliminary rating of F6, which was downgraded later to a rating of F5. [1]This is a list of tornadoes which have been officially or unofficially labeled as F5, EF5, IF5, T10-T11, the highest possible ratings on the various tornado intensity scales.
Although 2024's tornado number has been the largest since 2011, it's unlikely to exceed that blockbuster year. By the end of October 2011, the U.S. had racked up 500 more tornadoes than this year ...