Analysis of Causes and Radar Echoes of One Strong Convective Weather in the Midsummer of 2008 in Akesu

Heavy rainfall and hail convective weather happened in Akesu region of Xinjiang on June 24th 2008.By using conventional meteorological data and next-generation weather radar echo data, we analyzed the evolving characteristics of circumfluenee background,physical parameter field and radar echoes in this weather.The results showed that combined with the instability stratification with dry-cold upper layer and warm-humid lower layer,abundant water vapor and stronger uplift movement led to the instability energy to increase suddenly,and induced directly the occurrence and development of strong convective weather.These appearances including V-style rabbet,advent of bounded weak echo region,stronger wind vertical shear and phenomenon of airflow convergence in radar precipitation echoes were all typical characteristics of strong convective weather echoes.