One of the predicted consequences of global warming – and let’s note that we have already had a good bit of that; it’s not something that might happen – is extreme weather events: wetter storms, more violent storms, and so on. The devastation from the 240-odd tornadoes this weekend’s storm wound up is exactly that sort of thing.
On the other hand, there is a lot of coal and oil that needs burning, the Koch Brothers and their friends have all sorts of plans for money they will make if we do, and no single one of the tornadoes can be definitively blamed on climate change. By mathematical induction, the whole batch is therefore perfectly normal. Nothing to see here, folks, just move along.