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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]
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.
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.
Wednesday marks the 50th anniversary of the 1974 Super Outbreak, the 24-hour period between April 3 and April 4 during which 148 tornadoes touched down in 13 different states. Thirty-nine people ...
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 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 ...
More than 10 wildfires were reported with an estimated burned area of more than 163,000+ acres. The wildfire outbreak resulted in the deaths of two individuals and the injuries of 3 others. More than 42 structures were destroyed during the outbreak, mainly in the cities of Paradise and Waldo. [4] [5] 2021 Tornado: 90 $3.9 billion
1974 Super Outbreak: Tornado outbreak Ontario, Illinois, Indiana, Michigan, Ohio, ... Deadliest fire in California history. 84 1911 Cross Mountain Mine disaster: