Tornado outbreak

From Freepedia

While there is no single agreed upon definition, generally more than six tornadoes in a day in the same region is considered a tornado outbreak. The biggest tornado outbreak on record — with 148 tornadoes, most significantly including six F5 and 24 F4 tornadoes — occurred on April 3-April 4 1974 across the United States and Canada. It is dubbed the Super Outbreak.

See also: List of tornadoes and tornado outbreaks

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