Terrible Tornadoes in a Changing Climate - NYTimes.com
...a half century of observations in the United States show no change in tornado frequency and a declining frequency of strong tornadoes.
Does any of this mean global warming is not a serious problem? No.
It just means assertions that all weird bad weather is, in essence, our fault are not grounded in science and, as a result, end up empowering those [Revkin links to Marc Morano's Climate Depot here] whose prime interest appears to to be sustaining the fossil fuel era as long as possible. I was glad to see the green blog Grist acknowledge as much.