To provide more accurate grid precipitation data for disaster-prone areas in Guizhou during heavy rainfall events , combined with the regional heavy rainfall event on July 8 , 2023 , a suitability assessment is conducted using monthly accumulated precipitation and hourly precipitation data from 285 disaster risk spots in Guizhou . This assessment focuses on three products : the Guizhou two-source hourly precipitation product ( GZ _ PRE_2S) , the Guizhou three-source 10 min precipitation product ( GZ__PRE_3S) , and the multi-source analysis product with 1 km resolution from the National Meteorological Information Center (ART_1 km ) . The GZ_PRE_2S product integrates quality-controlled data from non-assessment stations in Guizhou and radar transmission data at different elevation angles , while the GZ _ PRE _3S product combines quality-controlled data from non-assessment stations , radar transmission data and FY4A satellite data. The three fusion products all reflect the spatial distribution of precipitation basically. However , the ART_ 1 km and the Guizhou two-source fusion precipitation product significantly underestimate the precipitation at the center of heavy rainfall . The Guizhou three-source fusion precipitation product shows better monitoring capability for hourly heavy rainfall and can provide real-time services in heavy rainfall areas , although the monitoring of non-rainfall areas adjacent to heavy rainfall zones requires further improvement. The study results indicate that the Guizhou three-source precipitation product can provide more accurate grid precipitation data for disaster-prone areas during heavy rainfall events .