The new scale is called the Enhanced Fujita Scale. The designations are EF-0 through EF-5. The EF-5 tornadoes have winds of more than 200MPH.
http://en.wikipedia.org/wiki/Enhanced_Fujita_Scale
The new scale ranks a F5 tornado as having wind speeds of >200 mph. So this was basicaly a F3 last year and a F5 this year.