Analysis of the Characteristics of Strong Weather Produced by a Short Band Thunderstorm Echo
In order to study the characteristics of short thunderstorm echo bands in heavy rainfall and thunderstorm gale events,the data of ground meteorological elements,lightning information,MI-CAPS Weather map,radar mosaic,etc.were used to analyze the short thunderstorm echo bands in the central and northern Jiangxi on May 17,2023.The results showed that:1)the short thunder-storm echo bands occurred in four weather features,the"outflow area"of 200 hPa,the southwest airflow vortex development in front of the 500 hPa,the southwest airflow Atmospheric circulation of 850 hPa vortex shear line,the development of Low-pressure ground area and convergence line,pro-vided a trigger mechanism for the formation of short thunderstorm echo bands in the afternoon.2)In the early progress stages of thunderstorm,the short band of thunderstorm echoes usually exhibited weak echoes and lightning activity;It developed near the ground convergence line behind the low vortex echo cluster.With the passage of time,the intensity of the echoes increased rapidly and light-ning began to increase.3)The characteristics of thunderstorm echo short band include strong echo intensity(50～55 dBZ),high echo crest height(about 10～12 km),short echo band(compared with cold front echo band and squall line echo band),small impact area,short duration and uneven distribution of echo unit intensity on the short band.4)The vertical integral Liquid water content(VIL)of heavy rainfall was about 20～25 kg/m2,compared with the VIL of general precipitation was Below 10 kg/m2.Therefore,in thunderstorm weather monitoring and forecasting,it is necessary to analysis multiple data to predict the heavy precipitation and strong winds thunderstorm better.
thunderstorm echo short bandlightning informationecho evolutionecho characteris-tics
万方数据
维普
