This article analyzes the physical process of the formation of hail, and summarizes the observation method according to the cloud observation experience for many years.
分析了冰雹形成的物理过程，并根据多年对冰雹云的观测判断经验，总结出观测冰雹的方法。
It has clear physical mechanism because it combines the information of ground precipitation observation station and aerial rain cloud in the process of directional retrieval.
由于综合了地表雨量站点和空中云层信息，因此反演具有明确的物理机制。
The results show that the cloud system model can forecast the cloud and precipitation physics process well. Macro and micro physical characters of cloud and precipitation forecasted are reasonable.
结果表明，该模式系统对这次云降水系统有较好的预报能力，预报的云降水系统的宏微观结构特征合理。
By using non-hydrostatic model MM5 V3, a snow took place on dec. 7,2001 in Beijing is simulated. The roles of cloud and micro-physical process are analyzed.
应用非静力平衡MM5V3模式对2 0 0 1年1 2月7日一次北京降雪过程进行了数值模拟试验，对云和降水物理过程的作用进行了初步分析。
By using non-hydrostatic model MM5 V3, a snow took place on dec. 7,2001 in Beijing is simulated. The roles of cloud and micro-physical process are analyzed.
应用非静力平衡MM5V3模式对2 0 0 1年1 2月7日一次北京降雪过程进行了数值模拟试验，对云和降水物理过程的作用进行了初步分析。
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