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中文摘要：
利用常规气象资料、雷达资料和数值预报产品资料,采用天气动力诊断分析方法,对2015年5月22-23日广西中部大范围暴雨过程的成因进行分析,结果表明：这次暴雨过程是在中高纬两槽一脊环流背景下,切变线快速移入,并与西南急流迎面相遇,发生强烈抬升凝结作用造成的;边界层西南急流为暴雨提供了充足的暖湿水汽、不稳定能量和抬升条件;低空850hPa和925hPa切变线的南北分离、间距适宜,两者之间区域是暴雨的主要落区;低层辐合、中高层辐散及整层强烈的上升运动有利于大量暖湿气流在桂中一带辐合抬升凝结;雷达资料的应用对暴雨预报和中尺度天气系统的识别和跟踪有重要参考价值。
英文摘要：
Based on the conventional observation data and the radar data and numerical forecasting products, a heavy rain storm weather process appearing in central Guangxi from May 22 to 23, 2015 were analyzed by synoptic dynamic diagnostic analysis. The results show that： under the two-toughs-and-oneridge circulation in middle-high latitude, this rain storm was caused by strong lifting condensation, which was formed by meeting of shear line and southwest jet. The southwest jet of boundary layer provided adequate warm vapor, unstable energy and lifting dynamic; the area of rainstorm appearing is the place between low-level 850 hPa and shear line 925 hPa separating. Lower convergence and upper divergence and the whole-level strong upward movement make for lifting condensation of warm moist air flows in central area of Guangxi; The application of radar data is significant reference value for rainstorm forecast and recognition of mesosacle weather system.
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