According to NOAA, there have been several tornado storms since 1947 which ranked F4 and F5. The Woodward storm of April 1947 was part of a multi-state outbreak, was an F5 and it claimed 116. One in November of 1930 struck Bethany along the area of NW 39th Street. "The tornado moved north-northeast from 3 miles west of the Oklahoma City limits, hitting the eastern part of Bethany. About 110 homes and 700 other buildings, or about a fourth of the town, were damaged or destroyed. Near the end of the damage path 3.5 miles northeast of Wiley Post Airfield, the tornado hit the Camel Creek school. Buildings blew apart just as the students were falling to the floor and looking for shelter; five students and a teacher were killed." It was an F4 and over 20 were killed. Overall about 100 tornadoes have hit OKC in the last 100 years.