Abstract In order to do a good job in the forecast and early warning of heavy rain,this paper uses FNL1°×1°,MICAPS,encrypted automatic weather station,radar echo and other observation data to analyze the local heavy rain process in Yingtan on July 2,2020.The results show that:1) the high specific humidity area of 925 hPa and the surface convergence line are very conducive to the occurrence of convective rainstorm in Yingtan.The good water vapor transport and accumulation,the deep upward movement formed by the coupling of the high and low level jets,and the strong convective instability at the low level provide good water vapor,dynamic and thermal conditions for the convective heavy rain in Yingtan.2) The location of heavy precipitation corresponds well with the location of surface cold outflow.The heavy precipitation mainly occurs in the front of the surface convergence line formed by cold outflow and ambient wind and the surface warm zone.3)The heavy rainstorm is mainly affected by the continuous influence of multiple strong echo systems.The echo has obvious development and strengthening in Yingtan,which is mainly due to the northerly airflow formed by the cold outflow,the southwesterly airflow and the easterly prevailing wind direction caused by the eastern corridor.The above results provide an analysis basis for the forecast and early warning service of Yingtan heavy rain.
Yuan Dongmei,Ma Zhongyuan,Zheng Jiangwei等. Cause analysis of a local convective heavy rain process in Yingtan[J]. Meteorological Hydrological and Marine Instrument, 2023, 40(3): 8-11.
2023, Vol. 40 
