0308号强热带风暴天鹅路径和降水分析

详细分析了0308号热带气旋天鹅在南海中部加强为强热带风暴后云系的演变以及对路径和降水产生的影响，结果表明：强对流云团的“吸附”作用是天鹅登陆后路径南折的主要原因；垂直速度场对热带气旋路径短期偏折方向有较好的预报指示意义，热带气旋有向强上升运动区偏折的趋势；中尺度暴雨出现在强对流云团中小涡旋的螺旋云带上或云顶亮温的梯度密集区与地面风向辐合区重叠处。

Analysis of Path and Precipitation of Severe Tropical Storm Koni

The evolution of cloud systems of severe tropical cyclone Koni and the effects on its path and precipitation in central part of South China Sea are studied in detail. The results show that the attraction of convective cloud cluster was responsible for turning southward after Koni's landing. The distribution of vertical motion has close relationship with the path changing of the tropical cyclone in a short period. The tropical cyclone tends to move towards ascending motion. The meso-scale heavy rain occurs in spiral cloud band of a small vortex in the severe convective cloud cluster or in the overlapping area of dense gradient of TBB and surface wind direction convergence.