Abstract:The Doppler radar data of 37 hail and thunderstorm cases in Dalian during 2003-2008 were calculated and processed by PUP softwares, several radar main parameters including echo intensity, echo top height, 30 dBz echo center height, top height of strong echo intensity VIL etc. and their temporal variations were obtained. Technique index models of hail cloud identification were summarized. Based on hail characteristics in Dalian, the hail clouds were divided into three types: cell, multi cell and super cell, and types of hail cloud radar indexes were summarized (namely hail suppression decision indexes). By integrating the latest hail suppression catalytic techniques and practical experience, the Dalian artificial hail suppression operation models (operation technique projects) were studied and designed. The research did some basic work on hail cloud identification, hail suppression scientific decision and operation, and greatly improved the scientific level and economic benefit on Dalian artificial hail suppression operation.