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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]
May 10, 2024, could possibly go down in history as Tallahassee's worst tornado outbreak ever. Three different tornadoes, two of them EF-2 tornadoes, hit the area Friday.
10 100 F4 Tornado outbreak sequence of May 25 – June 1, 1917, (Grazulis, p. 753) Louisville, Mississippi: 2014 April 28: 10 84 EF4 List of tornadoes in the tornado outbreak of April 27–30, 2014: Koontz Lake—LaPaz—Lakeville—Wyatt, Indiana: 1965 April 11: 10 82 F3 List of tornadoes in the 1965 Palm Sunday tornado outbreak, (Grazulis, p ...
The town of Logansport, Louisiana, was severely damaged by an F3 tornado. (4 significant, 1 violent killer) Tornado outbreak of April 8–9, 1999: April 8–9, 1999: Ohio Valley/Midwest: 54: 6 fatalities: Produced an F4 tornado that moved through the Cincinnati suburbs, killing 4. Two F4 tornadoes also touched down in Iowa. (15 significant, 3 ...
The EF-1 tornado hit wind speeds of 110 miles per hour and had a maximum width of 250 yards, according to the NWS. It traveled just over one mile in Ashland. The tornado touched down along Daniels ...
The top tornado-producing storms on record include 2004’s Hurricane Ivan, with 118 tornadoes, 1967’s Hurricane Beulah with 115 tornadoes and 2004’s Hurricane Frances with 103 tornadoes.
On Tuesday, April 10, 1979, a widespread and destructive outbreak of severe weather impacted areas near the Red River between Oklahoma and Texas. Thunderstorms developed over West and North Central Texas during the day within highly unstable atmospheric conditions following the northward surge of warm and moist air into the region, producing large hail, strong winds, and multiple tornadoes.
Here are 10 different types of tornadoes that have been documented across North America. The smallest type of tornado can be short-lived, lasting just a few minutes, but that is not always the case.