A severe convective storm accompanied with severe wind , heavy rain and hail on 23 august 2001 in beijing was simulated by mm5 initiated with ncep reanalysis data and a three - dimensional cloud model with hail - bin microphysics , which was initiated with the air soundings at beijing at 20 : 00 on 23 august 2001 , and some comparisons were also made between the simulated and natural storm 首先利用中尺度非静力平衡模式( mm5 ) ，模拟了2001年8月23日北京一次伴有大风、暴雨、冰雹的强对流天气发生发展的中尺度背景场，并根据mm5的输出结果分析了此次大风发生发展过程。
