Based on MICAPS conventional data, the process of soaking rain in April 2008 was analyzed in this study. This precipitation process was the combined effects of upper trough moving eastward, low vortex and low pressure northward. Northward low vortex brought plenty of warm and humid flow. Cold air brought by upper trough moving eastward provided dynamic conditions for the duration and intensity of subsequent precipitation. The stronger southward wind provided a favorable thermodynamic condition for precipitation. The precipitation forecast from Japanese Meteorological Center, European Meteorological Center and National Meteorological Center was accurate and consistent, which was conducive to the accurate determination of the rainfall intensity and the initial time.
