*2.2. Satellite-based Precipitation Data*

ST-CORAbico was used to correct storm events detected by the Integrated Multi-satellitE Retrievals for GPM (GPM-IMERG). GPM-IMERG is a high-resolution global precipitation product produced by [17] from the NASA/JAXA Global Precipitation Measurement (GPM) mission. The product combines information from multiple infrared, passive-microwave, and satellite-radar sensors to provide rainfall estimations at 0.1-degree spatial resolution every half-hour. GPM-IMERG computes Early, Late, and Final runs. The first two runs are near real-time versions of IMERG and are available at six hours and 18 hours latency, respectively. In the Early version, rainfall estimations are propagated forward while the Late has both forward and backward propagation allowing the incorporation of climatological gauge data. The final version is obtained three months after the measurements. In this run GPM-IMERG ingests the monthly rainfall analysis from the Global Precipitation Climatology Centre (GPCC; Schneider et al. [46]). This version is used for scientific

purposes, as it is considered to be the most reliable version [17]. In this study, we evaluated the early run of GPM-IMERG at a half-hourly temporal resolution. This version was selected, given it is the lowest latency data product available, a crucial aspect for operational applications.
