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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.
List of tornadoes in the 1974 Super Outbreak; 1974 Super Outbreak; 1979 Woodstock, Ontario, tornado; 1985 United States–Canada tornado outbreak; 1985 Barrie tornado; 1996 Southern Ontario tornadoes; Tornado outbreak sequence of April 1996; Tornado outbreak of July 1–3, 1997; Late-May 1998 tornado outbreak and derecho; Tornado 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]
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.
April 3 - As tornadoes ravage much of the United States and Canada in what becomes known as the 1974 Super Outbreak, WHAS Louisville, Kentucky air-traffic reporter Dick Gilbert takes to the skies to track a twister as it rakes across the Louisville metro area. He, and the station, receive a Presidential commendation for their storm coverage.
The tornado was part of a larger outbreak that spanned both the preceding and the following day. The outbreak spawned several long-lived, cyclic, tornado-producing supercells over portions of Eastern Canada and the Great Lakes region of the Midwestern and Northeastern United States, one of which eventually generated the Barrie tornado.
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April 3 - Windsor, Ontario, was hit with an F3 tornado, part of the 1974 Super Outbreak. Nine people were killed and 30 were injured, with an estimated $500,000 in damage. It is listed as the sixth deadliest tornado in Canadian history. [594] 1975