Large-scale tornado outbreaks increasing in frequency, study finds

Large-scale tornado outbreaks increasing in frequency, study finds 01/10/2017 02:51 PM EST The frequency of large-scale tornado outbreaks is increasing in the United States, particularly when it comes to the most extreme events, according to research recently published in Science. Full story at https://news.uchicago.edu/article/2017/01/04/large-scale-tornado-outbreaks-increasing-frequency-study-finds Source University of Chicago This is an NSF News From the Field item.   Follow NSF:  This email was sent using GovDelivery, on behalf of: National Science Foundation Update · 4201 Wilson Boulevard · Arlington, VA 22230 · 703-292-5111