Abstract: The tornado occurring on June 23 2016 in Funing County, Jiangsu Province was simulated using the operational Shanghai Meteorological Service-WRF ADAS Rapid Refresh System. The parent storm of the tornado was identified near Funing in the model output, which occurred in the area with very strong convective activities. Its development and timing agreed well with observations. However, the simulated vortex was 20 km north of its observed location with weaker surface winds. Further analysis indicated that a supercell was initialized within the updraft in the middle level prior to the occurrence of the storm, and extended upward and downward following the expansion of the updraft. With significantly enhanced updraft and increased z-helicity in the middle and upper levels, the x-helicity started to increase along with the intensified divergence in the upper level. In lower levels, the updraft and convergence both strengthened and the y-helicity increased. Following the weakening of divergence and updraft in the upper level, the cyclonic vortex eventually diminished and dissipated. In a comparative simulation without rapid data refresh, the supercell didn't exist, suggesting that the hourly data assimilation played a key role in successful simulation of the tornado.