well I just posted one.
And If you have more thunderstorms...would not logic suggest that could lead to more tornado?
When do we get more of our sever weather ( at least up here in the north) when it gets much hotter out..so logic says if the average temp goes up, that would likely lead to more storms...more storms, likely means more tornado...
Like I said though, this years very large number has to do with the Jet stream and other factors...but if you took like a 50 year average...and raise the temps...then more then likey you would have more.
Also if the temps are warmer, and the sea temps are warmer...does not logic suggest that will have at least some impact on at least the strength of Hurricanes?
AS it turns out we were both wrong.
"National Oceanic and Atmospheric Administration (NOAA) data, for example, show the number of strong to violent (F3-to-F5) tornadoes have been sharply declining since the mid-1970s. From 1967 through 1977 at least 30 F3-to-F5 tornadoes assaulted the U.S. each year, with an annual average of 50. Nearly 120 F3-to-F5 tornadoes struck the U.S. in 1974 alone. By comparison, merely 26 F3-to-F5 tornadoes have struck the U.S. on average each year since the turn of the century. The frequency of strong-to-violent tornadoes has been cut in half during the past 40 years.
These numbers are very important, as F3-to-F5 tornadoes produce the vast majority of damage and inflict the overwhelming majority of human casualties each year. Moreover, because modern radar technology can detect far more minimal (F1-to-F2) tornadoes than was the case in previous decades, meteorologists do not have reliable data on F1-to-F2 tornado trends. It should be noted, however, that even with modern radar technology detecting more minor tornadoes that could be detected in prior decades, the number of F2-to-F5 tornadoes (in other words, all but the very weakest of tornadoes) has similarly been declining since the mid-1970s.
A very striking aspect of the declining tornado activity is turning points when tornado activity has accelerated and declined. Global temperatures were cooling from the late 1940s through the late 1970s, yet NOAA records show strong tornadoes became more prevalent as global temperatures cooled. When global cooling turned to global warming in the late 1970s, tornado activity began its abrupt decline.
This brings us back to alarmist assertions that global warming is increasing tornado threats. For tornadoes, like virtually all other asserted global warming impacts, we have a very simple choice to make. We can believe real-world climate data or we can believe alarmist computer models that are programmed by alarmists, exist purely in cyberspace, and are consistently contradicted by real-world observations. When the real-world facts are known, the choice should be quite clear."
http://blogs.forbes.com/jamestaylor/2011/04/06/global-warming-taking-the-wind-out-of-tornadoes/
( just for you a 
