中文摘要：

依据北京近郊地区沙河、南苑和西郊3个测站15年（1990～2004年）的观测资料和常规探空资料，对北京地区局地雷暴大风发生的天气、气候特征和日变化特征进行了统计分析。研究从环流形势、探空结构和环境参数特征入手，分析了有利于北京地区产生雷暴大风的不稳定度指数和能量特征，得出在此期间最有利于雷暴大风产生的探空结构为：低层暖湿，中高层有干冷空气，不稳定度较大，风垂直切变较大。还探讨了一些对流参数，如最佳对流有效位能BCAPE、下沉对流有效位能DCAPE、风暴相对螺旋度SREH、大风指数WINDEX、风暴强度指数SSI、深厚对流指数DCI等对北京地区强对流天气发展潜势的指示意义。

英文摘要：

Synoptic and climatic characteristic of thunderstorm winds in Beijing are studied by using the observational data and sounding data during 1990 to 2004. The obviously diurnal characteristics was showed to thunderstorm winds occurrence. The ambient circulation, sounding structure and convection parameters are studied to discover the most favorable condition for the occurrence of the thunderstorm wind in Beijing. The instability index and energy parameters are studied as well. It shows that warm and wet at low level, dry and cold at middle level, strong convective instability, and relative strong vertical wind sheer are favorable to thunderstorm wind occurrences. More convective parameters associated to strong storms are also studied, such as the best convective available potential energy （BCAPE）, downdraft convective available potential energy （DCAPE）, Storm-Relative Environmental Helicity （SREH）, Wind Index （WINDEX）, Storm Severity Index （SSI）, Deep Convective Index （DCI） and so on, which are important to the potential development of the strong convection in Beijing.