The Fujita Scale was replaced by the Enhanced Fujita Scale in 2007, but I think 'EF-5' sounds stupid, so I vote we just use the new measurements for assigning numbers but still call them 'F-whatever'.

"Tornado Hunter", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

Alt Text

The Fujita Scale was replaced by the Enhanced Fujita Scale in 2007, but I think 'EF-5' sounds stupid, so I vote we just use the new measurements for assigning numbers but still call them 'F-whatever'.