Typhoon "Bailu" of 1911 caused extensive rainstorms in Guangxi,and its rain intensity and distribution were abnormal. The rainstorm was mainly concentrated in the east and south, and the rainstorm belt was northeast-southwest. Many forecast products, including subjective and objective forecasts, showed deviations in the area and intensity of this rainstorm. The weather dynamic diagnosis and analysis method was used here to analyze the causes of the abnormal distribution of the rainstorm based on conventional meteorological data and European centre reanalysis data, satellite cloud images, and mesoscale automatic stations. The results showed that this rainstorm caused by "Bailu" was formed by the coupling of low-and-upper level jets circulation and strong water vapor convergence. The guidance of the subtropical high airstream caused the clouds on the southwest side of the "Bailu" to move slowly westward. The input of the southwest monsoon airstream revived, strengthened and maintained the "Bailu" vortex. The plenishment of abundant water vapor caused continuous and concentrated rainstorm in the eastern and southern regions of Guangxi. The asymmetric structure of typhoons was also an important reason of abnormal precipitation distribution.

1911年台风“白露”在广西造成大范围暴雨,降雨强度和分布异常。暴雨主要集中在东部和南部，暴雨带呈东北—西南走向。许多预报产品，包括主观预报和客观预报，都显示出此次暴雨的面积和强度存在偏差。本文采用天气动态诊断分析方法，结合常规气象资料和欧洲中心再分析资料、卫星云图、中尺度自动站等资料，分析暴雨分布异常的原因。结果表明，此次“白露”暴雨是由高空急流环流与强水汽辐合耦合形成的。副热带高压气流的引导导致“白鹭”西南侧的云层缓慢向西移动。西南季风气流的输入使“白露”涡恢复、加强和维持。丰富的水汽补充导致广西东部和南部地区持续集中暴雨。台风的不对称结构也是降水分布异常的重要原因。