Analysis of New Generation Weather Radar Data for a Severe Convective Storm

A severe convective storm process occured in the middle of Gansu province on May 30,2005 was analyzed by using CINRAD/CC Doppler weather radar data.It is found that the main meso-scale system causing this severe convective storm was the squall line.The storm first appeared at 15:00,then moved to the southeast,and from 16:15 to 17:03 the multi-cell storm became more strongly and developed into the super-cell storm with the characteristics of vortex and zonal echoes.There were two obvious outflow boundaries observed in south of the supercell lying to the southwest and southeast of the hook echo of the storm,respectively.The shape of the low elevation reflectivity in the left front flank of the supercell was an inverted V,the maximum of echo intensity appeared in the bounded weak echo zone with the value over 70 dBZ.The corresponding radial velocity maps showed a strong mature meso-cyclone feature.In this period the maximum vertical integrated liquid water(VIL) reached above 70 kg/m2 and the height of echo top(ET) was 17-18 km.Hence,this storm presented the typical features of supercell storms.