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Tracks of the 1974 Super Outbreak's 147 known tornadoes in the United States and fatalities by county.. This is the list of tornadoes confirmed that occurred during the record-breaking 1974 Super Outbreak tornado event that occurred on April 3–4, 1974 across the eastern half of the United States and in Ontario, Canada.
The 1974 Super Outbreak was the second-largest tornado outbreak on record for a single 24-hour period, just behind the 2011 Super Outbreak. It was also the most violent tornado outbreak ever recorded, with 30 violent (F4 or F5 rated) tornadoes confirmed.
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]
The super-tornado outbreak of April 3 and 4, 1974, was the worst in U.S. history, with 148 twisters touching down in 13 states. When it had ended 16 hours later, 330 people were dead and 5,484 ...
Tornado outbreak sequence of May 2004; List of tornadoes in the May 2004 tornado outbreak sequence; Southern Ontario tornado outbreak of 2005; List of tornadoes in the outbreak of May 22–27, 2008; Southern Ontario Tornado Outbreak of 2009; Tornado outbreak of June 5–6, 2010; 2011 Super Outbreak; 2011 Goderich tornado; Tornado outbreak of ...
The long-track Mississippi–Alabama EF4 tornado was down from 2 hours, 53 minutes, the longest duration for a tornado in the outbreak. [7] The outbreak continued during the overnight and into the morning of April 28, with 47 more tornadoes occurring from Florida to New York. Most of the tornadoes very relatively weak and caused comparatively ...
A destructive outbreak ended only 17 hours before the Super Outbreak began in the same areas. (10 significant, 3 violent, 4 killer) [114] 1974 Super Outbreak: April 3–4, 1974: Eastern United States – Ontario: 148: 315 fatalities: The second-largest and most violent tornado outbreak ever documented. At least 50 of them were killers.
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