Tropical Storm Imelda struck the southeast coastal regions of Texas from 17–19 September, 2019, and delivered precipitation above 500 mm over about 6000 km2. The performance three IMERG (Early-, Late-, Final-run) GPM satellite-based products was evaluated against Stage-IV radar estimates. Basic probabilistic statistical metrics, such as CC, RSME, RBIAS, POD, FAR, CSI, PSS were employed to asses...