吉安南部山区一次台风强降水雷达回波特征分析

对吉安南部山区1次台风强降水的雷达连续观测资料进行了分析,结果发现,根据雷达径向速度图上反映的低层暖平流迭加辐合、高层迭加辐散的特征,可预测上升运动的发展趋势;分析垂直风廓线产品,可以得出风场的垂直切变情况,有助于判断云层的发展高度,进而判断降水演变情况;综合应用组合反射率因子迭加风暴综合信息表,如DBZM、HT、TOP、FCSTMVMT、VIL等,可作为剖析风暴垂直结构的重要参考数据,有助于预测风暴的强度和发展趋势,从而进行短时临近预报。

THE RADAR DATA CHARACTERISTICS OF HEAVY RAIN FROM A TYPHOON IN THE SOUTH MOUNTAINS IN JI'AN

The radar data of heavy rain from a typhoon in the south mountains in Ji'an are analyzed.The results indicate that we can predict the tendency of upward movement based on the characteristics of low-level convergence and upper-level divergence in Base Velocity data,can estimate the tendency of rain with the cloud height which can judge from the configure of wind vertical shear by analyzing the Vertical Integrated Liquid data,can forecast the tensity and development of storms by using the information,such as DBZM,HGT,TOP,FCST MVMT,VIL,etc.,from the attribute table of Composite Reflectivity data as the essential references to anatomy the vertical configure of storms,and then can make short-term forecast and nowcast.