文档介绍：Cause analysis of a hail urred in Jiangxi on19March2013JIN Mina, CHEN Yunhui, XU Aihua, GUO Yan, CHEN Juan(Jiangxi Provincial Meteorological Observatory, Nanchang330046)Abstract:The cause analysis of a wide range hail event occurred in Jiangxi on19March2013was performed with various data includingconventional observation data, satellite images, Doppler-Radar data, observations from automatic weather stations, reanalysis data fromNCEP, etc. The results indicate that the hail event occurs under favorable environmental conditions: strong thermal and dynamic instability inmiddle and lower troposphere provides instability mechanism for formation and growth of hail; southerly jet in warm and moist boundary layer,southwest jet in the low-level and "dry" southwest jet in the medium level have an important contribution to the development of the thermaland dynamic instability mechanism; suitable heights of0℃level and -20℃level are favorable to growth of hail. The hail event occurring inthe northern part of Jiangxi province under the condition of frontal inversion in boundary layer acts as“elevated thunderstorm type”convec-tive weather. The hail event occurring in the southern part of Jiangxi province under the condition of stronger warm advection in boundary lay-er acts as“non-elevated thunderstorm type”convective weather. The distributions of temperature stratifications in boundary laye