Abstract:In this study,the severe convective rain process occurring in Hongan,Hubei Province is simulated using the Weather Research and Forecasting Model(WRF).The results show that the severe convective weather developed under the condition of abundant water vapor,divergence in high-level,convergence in low-level,and unstable stratification.Simulated rainfall and radar reflectivity are in high agreement with the situation,and evaporation of raindrops is significant under the cloud.After the sensitivity experiments of reducing the evaporation of rainwater to half,quarter and zero,the radar reflectivity is weakened,and is shown to have great influences on the evolution of the convective process.The characteristics of the rain zone are similar to those of the original scheme,and the regional average precipitation is weakened.Reducing evaporation causes the precipitation intensity in precipitation initial occurrence stage and dissipation stage to be enhanced and weakened in the development of the precipitation process.At the same time,the weakening of the vertical airflow and reduction of graupel content are caused by the weakening of raindrop evaporation.In summary,the evaporation has an influence on the dynamics,thermal structures,cloud microphysical structures and processes of convective clouds.