Extreme tornado outbreaks have become more common, says study
Thursday, March 3, 2016 - 04:10
in Earth & Climate
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.