This document summarizes efforts to improve riverine flood forecasting in the Lower Mekong Basin. It describes the development of an operational bias correction tool called GPM-BICO to improve the accuracy of near-real-time satellite rainfall data used in the Mekong River Commission's Flood Early Warning System (MRC-FEWS). Testing showed GPM-BICO reduced errors in rainfall data by up to 50%, improving streamflow forecasts. It also describes incorporating the higher resolution CHIRPS-GEFS rainfall forecast product into MRC-FEWS, which provided more accurate forecasts up to 15 days compared to other products like GFS. MRC has begun implementing both GPM-BICO and CH