中文摘要：

利用常规气象资料、NCEP 1°×1°6小时再分析资料和昆明CINRAD/CC多普勒天气雷达资料对春季出现在滇中地区的两次冰雹天气过程进行对比分析。结果表明,4.11冰雹过程为系统性的槽脊移动,属于高空冷槽形势下的典型低空切变降雹,3.22冰雹过程为一般性对流天气过程,属于一般性降雹。两次过程在V-3θ图中高层的3条θ线均有不同程度的左倾,θse和饱和θse均有不规则折拐,同时出现＂蜂腰＂状结构,并且在冰雹发生前低层为顺滚流、高层为逆滚流,冰雹结束时则为顺滚流减弱或者消失的共同特征,4.11冰雹过程低层有逆温冷层云出现,而3.22冰雹过程没有。通过指数分析看出4.11冰雹过程层结不稳定性强于3.22冰雹过程。雷达图像中4.11冰雹过程有钩状回波、明显的入流缺口、回波悬垂、正负速度对（弱切变）,强回波伸展高度达到7km等特征,3.22冰雹过程有回波悬垂,强回波伸展高度达到5km,并无明显的正负速度对出现。

英文摘要：

The routine meteorological data, NCEP 1°×1° reanalysis data and the CINRAD/CC Doppler Radar data in Kunming are used to analyze two hail weather processes appearing in the middle of Yunnan. The results show that： The 4. 11 process is tough - ridge moving of system, it is typical low - level shear falling - hail with cold tough condition in the high level, but 3.22 process is a general convective process that is a general failing - hail. Three 0 line in the top have different degrees of left leaning in V- 30 graph about these two processes, 0se and saturated 0se are irregular bended, ＂ wasp waist＂ structures appear at the same time and the clockwise rolling flow in the low layer, the anti - clockwise rolling flow in the high layer occurred before hailing. The clockwise rolling flow appears weakening or disappearing at the end of the hail, inversion cold clouds appear in the low layer with 4.22 hail process, do not appear with 3.22 hail process. The convective stability of the 4. 11 hail process is stronger than that of the 3.22 hail process with the index analysis. The characteristics of hook echo, obvious inflow gap, echo suspension, positive and negative velocity （weak shear） , height of strong echo getting to 7km appear in radar images, and so on. The characteristics of echo suspension, the strong echo stretching height reached 5km, and there is not the positive and negative velocity in 3.22 hail process.