The research article does have data for both STP and tornado reports, so it does not rely entirely on STP. Also it makes the point that the incidence of tornadoes remains higher in some of the Great Plains area where the trend is down than the incidence of tornadoes farther east where it is rising. Of course some of this gets lost in the media coverage.My concern is the media equating "trends in STP" to "trends in tornadoes." My joke about Michigan is part of it - showing that we get more STP in the summer months than before, therefore concluding that Michigan gets more tornadoes, doesn't match actual tornado counts. And I totally get the concern with the changing patterns, and the history of tornado counts, but 14 of the last 20 years have been below normal in Michigan. And the ones that have occurred are often in areas that were NOT counted before (rural spots in northern Michigan have been the hotbed lately,) Concluding that actual tornadoes are moving where STP moves is strange.