Fujita scale, a rating of a tornado's intensity by its impact on structures and vegetation
Herby was devastated by a F3 tornado on August 15, 2008.
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Examination by a severe weather team from the Bureau of Meteorology examined the damage in the Bucca and Kolan region and recorded it as an 'F4' on the Fujita scale.
1999 Oklahoma tornado outbreak – produced an F5 tornado which had winds estimated at 511 km/h (318 mph) by the doppler data of the weather radar
As a weatherman, Whitney is best remembered for his timely warning on April 3, 1974 of a Category F5 tornado that went through Xenia, Ohio during the 1974 Super Outbreak.
Further east, near Peterborough, an F2 tornado hit Bridgenorth damaging or destroying 20 homes and a marina with winds estimated upward of 200 km/h (120 mp/h).
The original high school was destroyed by an F5 tornado on April 3, 1974, during what was dubbed as the Super Outbreak, and was later rebuilt in the north of the city.