Abstract: A typhoon moving inland on Aug. 29, 1980 induced a low in the Jiangxi and Hunan Provinces and brought heavy rains at the induced low. Using a 5-level sigma-coordinated primitive equation model, the occurrence of the induced low in the typhoon inverted trough and the resulted rainstorm are forecasted, with consideration of physical processes for large scale condensation, cumulus convection and momentum exchange, solar radiational heating, long-wave radiational cooling, turbulent transfer and diffusion of momentum, heat and specific humidity in vertical and horizontal directions, as well as the transfer of sensible heat.The results show that the horizontal circulation, vorticity field, divergence field, vertical velocity field and convective precipitation of the induced low correspond with reality in terms of their domains, diagnostic products and satellite cluster imageries. The rainfall is less in the simulation than in the observal-tion.