The conterminous United States are projected to become more prone to flash floods in a high-end emissions scenario

Abstract Flash floods are largely driven by high rainfall rates in convective storms that projected to increase frequency and intensity a warmer climate the future. However, quantifying changes future flood flashiness is challenging due lack of high-resolution simulations. Here we use outputs from continental convective-permitting numerical weather model at 4-km hourly resolution force hydrologic scale depict such change. As results indicate, US becoming 7.9% flashier end century assuming high-emissions scenario. The Southwest (+10.5%) has greatest among historical flash hot spots, central (+8.6%) emerging as new spot. Additionally, flood-prone frontiers advancing northwards. This study calls on implementing climate-resilient mitigation measures for spots.