The precipitation session focuses on precipitation observation, modeling, estimation, and applications of in-situ and remotely sensed precipitation products. Topics include, but are not limited to (1) precipitation processes and modeling; (2) advances in remote sensing of precipitation from satellite, airborne, and ground-based platforms; (3) recent development pertaining to fusion and downscaling of precipitation products; (4) assimilation of precipitation and precipitation-related variables in weather or water models; (5) impact of uncertainties associated with precipitation observations on hydrologic design and modeling, (6) assessment of precipitation variability, including extremes, across scales.