Tony Lupo, University of Missouri (IMAGE) University of Missouri-Columbia Caption Lupo, along with graduate assistant Laurel McCoy, found that when surface sea temperatures were warmer than average, the US experienced 20.3 percent more tornadoes that were rated EF-2 to EF-5 on the Enhanced Fuijta (EF) scale. Credit University of Missouri Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.