 
 <prompt> How many miles di lower bound of di width of di EF5 tornado on May 20th, 2013? 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. Being for di center of wetin dem dey call Tornado Alley, e dey prone to plenty tornadoes wey dey very frequent and severe, as well as hailstorms wey dey very severe and occasional derechoes. Tornadoes don happen for every month of di year and another smaller 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 strike within di city limits since 1890. Since di time wey weather records don dey kept, 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 top 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 bin dey 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 EF1 and 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. 