The disparities in circulation backgrounds and divergence-vorticity configurations of locally developed warm-sector short- and long-term heavy precipitation events (SHPEs & LHPEs) are compared in this work. Results show that double LLJs accompany the evolution of both types of rainstorms but SHPEs are mainly located in the negative relative vorticity (RV) area to the right of the synoptic-related LLJ, while LHPEs are located in the positive RV area to the left side of LLJ. When triggering, both types of rainstorms maintain the structure of bottom convergence and lower-middle layer (875-700 hPa) divergence. Then, in the lower-middle layer of the SHPE, the negative RH encourages the transition from divergence to convergence, which prevents convection from continuing, but the LHPE always retains its prior structure, allowing it to endure longer. This work provides new insights into the evolution of rainstorms with different durations, which can aid in the accurate forecasting of warm-sector rainstorms.