 
 <prompt> Which one of di following no be rating for Fujita scale: F4, F5, or Oklahoma City? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Oklahoma City get very active severe weather season from March go reach June, especially for April and May. Dem dey for di center of wetin dem dey call Tornado Alley, so e dey prone to plenty tornadoes wey fit be very strong, hailstorms wey fit be very severe and sometimes derechoes. Tornadoes don happen for every month of di year and another small peak dey happen during autumn, especially for October. Oklahoma City metropolitan area na one of di cities wey dey prone to tornado pass for di world, with about 150 tornadoes wey don happen inside di city since 1890. Since dem dey keep weather records, Oklahoma City don suffer from thirteen violent tornadoes, eleven F/EF4s and two F/EF5. On May 3, 1999 parts of southern Oklahoma City and nearby suburban communities suffer from one of di most powerful tornadoes wey don happen, na F5 on di Fujita scale, with wind speeds wey radar estimate say dey reach 318 mph (510 km/h). On May 20, 2013, far southwest Oklahoma City, along with Newcastle and Moore, dem suffer from another EF5 tornado; e be 0.5 to 1.3 miles (0.80 to 2.09 km) wide and e kill 23 people. Less than two weeks later, on May 31, another outbreak affect Oklahoma City area, including an EF1 and an EF0 inside di city and one tornado wey dey several miles west of di city wey be 2.6 miles (4.2 km) wide, na di widest tornado wey dem don ever record. 