Here's article after article claiming basically that scientists are undecided about the effect of "global warming" on hurricanes and tornadoes. Don't let the leftwing media sell fear about climate change and its relationship to hurricanes or other extreme weather. 

https://www.forbes.com/sites/jamestaylor/2013/05/08/sorry-global-warmists-but-extreme-weather-events-are-becoming-less-extreme/#1091d4ea55a4
https://www.forbes.com/sites/jamestaylor/2013/05/08/sorry-global-warmists-but-extreme-weather-events-are-becoming-less-extreme/#1091d4ea55a4
https://www.livescience.com/34488-tornado-unknowns.html
http://ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_TS_FINAL.pdf