that tornado that hit joplin by the way was a confirmed f4(207-260 mph winds)
trying to find out the last time there was an f4.
i know over 90 percent of tornadoes are f1s or dont even register.
TUSCALOOSA | The National Weather Service determined that the tornado that tore through Tuscaloosa and Tuscaloosa County on Wednesday had winds 10 mph slower than needed to register as an EF5, the strongest category of tornado.
Instead, it is considered an EF4, with peak winds of about 190 mph.
“Whether you are talking about an EF4 or EF5 you are talking about a violent tornado, so we don’t need to get hung up on EF4 or EF5,” said Jim Stefkovich, meteorologist in charge at the National Weather Service’s office for central Alabama. “Maybe it’s a judgment call or not, but, hopefully, no one is offended by it.”
The Enhanced Fujita Scale uses a range of factors, including sustained winds, peak gusts and damage, to assign a strength to a tornado. An EF3 tornado has sustained winds between 136-165 mph, and an EF4 tornado would have winds between 166-200 mph. A rare EF5 tornado would have winds in excess of 200 mph.
The only recorded F5 tornado in Tuscaloosa County, based on an older Fujita scale, was in March 1966 that killed one and injured 518. The only other F4 tornadoes were in February 1975 and December 2000. The latter killed 11 and injured 144.