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Extreme tornado outbreaks have become more common, says study


March 2, 2016

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Most death and destruction inflicted by tornadoes in North America occurs during outbreaks -- large-scale weather events that can last one to three days and span huge regions. Now, a new study shows that the average number of tornadoes in these outbreaks has risen since 1954, and that the chance of extreme outbreaks -- tornado factories like the one in 2011 -- has also increased.Full Story

Source
The Earth Institute at Columbia University

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