The Oklahoma City metropolitan area, including Norman, is the most tornado-prone area in the world. The Storm Prediction Center (SPC), a branch of the National Oceanic and Atmospheric Administration (NOAA) is located at the NWC.SPC forecasts severe storm and tornado outbreaks nationwide.ith the completion of Interstate 35 in June 1959, Norman found its role as a bedroom community to Oklahoma City increasing rapidly; in 1960 Norman's population was 33,412 but by the end of the decade had grown to 52,117.