广西百色市春季强对流天气特征及环境场配置分析

Analysis of Spring Severe Convective Weather Characteristics and Environmental Field Configuration in Baise City, Guangxi

选取2009—2016年广西百色市春季(3—5月)冰雹、雷雨大风等强对流天气个例和灾情资料,利用常规观测数据、自动气象站、多普勒雷达产品等资料,对百色市春季发生冰雹、雷雨大风等强对流天气进行分析,结果表明:每年3月中旬—5月上旬是冰雹发生的高峰期,下午到前半夜(14:00~23:00)是最容易出现冰雹天气的时段。冰雹直径以20 mm以下居多,但出现20mm以上大冰雹的概率可达40%。田林县潞城乡是冰雹日数最多的地方,平均每年出现1.5 d。雷雨大风天气主要集中出现4月上旬—5月中旬,日变化特征与冰雹类似,风力以7~9级为主。发生雷雨大风最多的地方位于隆林天生桥镇,平均每年出现4.4 d。

Selected cases of strong convective weather such as hail, thunderstorms and strong winds in spring(March to May)in Baise city, Guangxi from 2009 to 2016,as well as disaster data, using conventional observation data, automatic weather stations,Doppler radar products and other data, The analysis and research on the strong convective weather such as hail, thunderstorms and strong winds in Baise city in spring showed that: the peak period of hail occurrence was from mid-March to early May each year,and hail was most likely to occur from the afternoon to the first half of the night(14-23o’clock). weather period. The diameter of hailstones was mostly below 20 mm, but the probability of large hailstones above 20 mm can reach 40%. Lucheng and rural areas in Tianlin county were the places with the most hail days, with an average of 1.5 days per year. Thunderstorms and strong winds mainly occurred from early April to mid-May. The diurnal variation characteristics were similar to hail, and the wind power was mainly 7-9.The place with the most thunderstorms and strong winds was located in Tianshengqiao Town, Longlin, with an average of 4.4 days per year.