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利用济南多普勒天气雷达和自动站探测资料,结合天气形势及天气实况,对2015年7月14日发生在山东境内的1次阵风锋及锋后大风演变特征进行了分析.结果表明,阵风锋在其3h生命史中有1h出现8级以上的大风天气,实测的极大风速达到了24m·s-1(9级大风).阵风锋形成发展阶段和旺盛阶段,产生阵风锋的强对流单体的最大反射率因子维持在60 dBZ左右,强中心高度基本在5km左右,单体顶高基本在9km以上,C-VIL基本在40kg·m-2以上.风暴具有先左向传播后右向传播的特征,形成左右2个风暴群,共同维系着阵风锋的发展与持续.左右风暴群的强度、顶高等参数差别不明显,但所致大风却差别较大.左侧风暴群所致最大风力达到10级,其前方阵风锋上最大风力达到9级,右侧风暴群所致最大风力为8级,其前方阵风锋上最大风力为7级.左侧强风暴后侧低层存在大的后部入流,而右侧风暴群没有这种现象.强的后部入流可导致风暴后部产生更强的下沉气流,从而在地面产生更强的下击暴流及强的阵风锋.“,”Using Jinan Doppler weather radar and automatic station data,and combining the weather situation and the real weather state,the evolution characteristics of the gust front and the wind after the gust front occurred in Shandong province on 14 July 2015 were analyzed.The results showed that the wind with more than 8 grade continued more than an hour during the life cycle of the gust front,which exceeded three hours,and the measured maximum wind speed reached 24 m · s-1 (9 grade gale).During the development and vigorous stages of the gust front,the storm parameters of the strongest convective cell leading to the gust front were that maximum reflectivity factor remained at around 60 dBZ,the strong center height top was around 5 km,cell top was above 9 km,C-VIL was over 40 kg · m-2.The storms had the propagation characteristics with first left to spread then right to spread,then two storm groups were developed,which jointly maintained the development and sustainability of the gust front.The difference between the two storm groups for the echo intensity and top was not obviously,but there was larger difference among the strong winds caused by the two storm groups.The largest wind power reached 10 grade caused by the left storm groups,and the gust front ahead of them reached the largest wind power with 9 grade,but for the right storm groups,the corresponding values were 8 grade and 7 grade respectively.There was lager inflow in the lower back of the left strong storms,and the right storms did not.Strong rear inflow led storms to produce stronger sinking airflow,then to produce stronger downburst and gust front on the ground.