These are the source codes of the Weather Research and Forecasting (WRF) model version 4.4.2 and the WRF Preprocessing System (WPS) version 4.4 that we utilized in our paper “Improving ‘23.07’ Heavy Rainstorm Simulation through Assimilating FY-3E MWTS-3 Radiance Data.” The WRF and WPS source codes were obtained from the WRF-model GitHub repository, available at the following URLs: WRF V4.4.2: https://github.com/wrf-model/WRF/tree/release-v4.4.2 WPS V4.4: https://github.com/wrf-model/WPS/tree/release-v4.4 We acknowledge and thank the Mesoscale and Microscale Meteorology Laboratory (MMM) of the National Center for Atmospheric Research (NCAR) for their open-source policy, which allows researchers to freely use, modify, and distribute the WRF and WPS codes. This policy has been instrumental in advancing our research and the broader scientific community’s efforts in atmospheric modeling.