Abstract:The severe rainstorm process which occurred in the central part of Hebei on 1 July 2013 was analyzed by using the conventional sounding data, NCEP reanalysis data, automatic stations data, FY 2E satellite data and radar data. The results show that: (1) The rainstorm can be divided into warm sector rainstorm and cold shear rainstorm. During the process of warm sector rainstorm, low level moisture flux convergence was dramatically enhanced. (2) Strong ageostrophic wet 〖WTHX〗Q〖WTBZ〗 vector convergence took place before the warm sector rainstorm, and it has good performance in forecasting the warm sector rainstorm. Large value area of ·〖WTHX〗Q〖WTBZ〗* only with convective condensation heating in warm sector can be used to indicate the heavy rainfall area. Furthermore, condensation heating plays an important role in ageostrophic wet 〖WTHX〗Q〖WTBZ〗 vector convergence. (3) Warm sector rainstorm occurred in the developing stage of warm meso β scale convective clouds, influenced by the surface mesoscale vortex. Then, cold shear convective clouds incorporated with warm sector convective clouds formed PECS, which worked in with the surface convergence line causing rainstorm again. (4) The radar echoes show that meso γ scale convergence lines in the meso β scale cyclone flow field creates a favorable dynamic condition for banded strong rainfall echo in Sizhilan Area.