The dynamic mechanism of the development of the mesoscale low vortex with shear line in association with an abruptly extraordinary heavy rainstorm was diagnosed byusing the MM5(V2.12)successfully simulated high spatial resolution (20 km) output data.

• 利用MM5模拟提供的高空间分辨 (2 0km)输出资料 ,对这次突发性特大暴雨中尺度切变线低涡发展的动力学机制进行了诊断。