Published Wednesday in the journal Climate Dynamics, Professor James Elsner writes that though tornadoes are forming fewer days per year, they are forming at a greater density and strength than ever before. So, for example, instead of one or two forming on a given day in an area, there might be three or four occurring.
FSU Press Release: http://news.fsu.edu/More-FSU-News/New-research-links-tornado-strength-frequency-to-climate-change
Climate Dynamics Article: http://link.springer.com/article/10.1007%2Fs00382-014-2277-3
Climate Dynamics Article: http://link.springer.com/article/10.1007%2Fs00382-014-2277-3