关键词: 冰雹, 强度路径, 时空分布, 灾害, 综合指标, 辽宁

Abstract: Based on the data from 56 weather stations in Liaoning province from 1951 to 2008 and Chinese meteorological disaster dictionary, the temporal-spatial distribution of hail disaster was analyzed. The results indicate that the hail often happens in the mountains, followed by the hilly areas, then the plain and the coastal areas. The moving track of hail is identical to lay of the land such as mountains, river or coast line. The seasonal change of hail is obvious, and hail often occurs from April to October. Most hails happen in May and June, especially in June. The days of hail decease during the recent 30 years. Hail usually occurs from the noon to the evening. The key areas of hail prevention include Liaoxi corridor, the plain of midlle Liaoning and Dalian of southern Liaodong island. According to the high level situation classification, weather systems forming hail include cold vortex, cold vortex rear horizontal trough, high level trough and trough rear northwest air current, and the corresponding ground situation is low pressure cold front.