I don't know but it's starting to piss me off; the one in Alabama hit twenty minutes away from where I live, and the one in Joplin destroyed my grandparent's house.
I can't say whether it's directly correlated with global warming, though I say that the way climate change works is increases in average yearly temperatures leads increased ocean surface temperatures. Higher ocean temperatures creates more storm systems.
With that, I don't think this kind of severe weather will go away anytime soon Increased storm systems, however, counterbalance global warming in that the increased reflection off of clouds diverts more of the sun's energy, thus cooling the planet.
Well in the Texas panhandle we are literally on fire. There were at least three fires around where I live just today, thousands of acres burned. Heard about Palo Duro canyon? Yea its on fire And will not rain, ever, for no apparent freakin reason. That Tornado in Joplin was just...horrible, sorry about your grandparents house Nurvana. So yes Mother nature definitely does need a Xenex, or two, or three, or 4