Multiscale diagnosis of the energy budget for a warm-sector rainstorm event in winter in the coastal area of Guangxi

Based on multiscale diagnosis method of energy budget, the missing-forecast coastal warm-sector rainstorm process of Guangxi occurred in 24-26 January 2020 was analyzed by using the stational data, Doppler radar, FY-2G satellite data and the ERA5 reanalysis data. The results are shown below: The warm and moisture southwest jet in front of the southern branch trough provides a favorable synoptic condition for the rainstorm. The convection system was constantly triggered by the trumpet topography in the northeast of Vietnam, and moved northeastward to the coastal of Guangxi, which was influenced by the upper level airflow and produced significant amount of precipitation. It is found that the occurrence and development of warm-sector rainstorm were mainly dominated by the convection-scale kinetic energy that correlated well with the former in evolution. The convective energy mainly come from the middle and lower troposphere and losts in the upper troposphere. The kinetic energy from the background scale contribu