Multiple consecutive days of tornado activity spawn worst events

Multiple consecutive days of tornado activity spawn worst events
West Lafayette IN (SPX) May 02, 2014 - Significant tornado outbreaks and especially strong tornadoes are more likely occur within periods of activity lasting three or more days, according to a Purdue University tornado expert. Jeff Trapp, a professor of earth, atmospheric and planetary sciences, examined 30 years of U.S. weather records and found that an outbreak of 20 or more reported tornadoes had a 74 percent probability of ... more

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