Based on the CINRADSB radar data of Guilin and the NCEP data, the event including series torrential rain occurring in north region and series hail storm and tornado occurring in south region between 9 to 11 November 2004 is analyzed. The results show that the flash flood occurring in Guilin City was led by an HP with bow echo. The series torrential rain occurring in north region of Guilin was led by the effect of series LEWP. There were FFNs ahead of bow echo and LEWP, which showed that there was strong southwest wind intruding into the upward current. There was RIN behind the bow echo and the LEWP, which showed that there were strong downdraft winds and the rear northerly wind. The bow echo can be used to issue flash flooding warning ahead of 20 to 33 minutes. The hail storm and tornado events which occurred in south region of Guilin lasting for two days were led by the isolated γscale supercells moving rightly. The TBSS feature can be used to issue big hailstorm warning ahead of 15 to 22 minutes. The convective cell developing to tornado was followed by cyclone divergence feature of downburst, it was very close to the time that the damage wind occurred.