Unpredictable changes in rainfall patterns demand the use of accurate weather models. This work aims to assess the performance of the WRF-ARW model with the Multi-Scale Kain-Fritsch (MSKF) scheme in forecasting rainfall over South Sumatra during September to November 2024. The model uses GFS data as input and is validated against ERA5 data. Results show that WRF-ARW predicts higher rainfall tha…