Increasing tornadoes or better information gathering?

John Kerry’s comment about the recent tornadoes in the southeastern USA being caused by “global warming” has caused more than a few dustups on the Internet blogs in the last couple of days. So, from the perspective of a former TV meteorologist, I thought I’d share some of my thoughts about modern tornado statistics. Graph from NWS/NOAA. Smaller (F1) tornadoes seem to…