Hail Risk and Cropland Exposure Changes in the United States

The U.S. agricultural landscape is ever evolving, with uncertainty in future losses driven by cropland expansion comingling with a changing weather and climate risk landscape. Among these weather perils is hail—currently the third-costliest peril affecting crop production in the U.S. This research employs a combination of historical and future projection cropland layers, observed severe hail reports, crop-hail insurance data, and output from convection-permitting climate simulations to demonstrate the interrelationship between changing cropland exposure and hail risk during the twenty-first century. Built-environment impacts from weather-related hazards are driven by a growing and expanding exposure footprint, and results reveal that agriculture may follow suit for some U.S. regions. Results from a Monte Carlo simulation reveal that, while the Midwest possesses the most cropland exposure to hail, the Great Plains contain the highest vulnerability based on the collocation of an extensive hail footprint during the boreal summer growing season and the projected expansion of croplands. Despite projected decreases in severe hail days in the Great Plains, the increase in regional cropland exposure illustrates the “Expanding Bull’s-Eye Effect” concept within the context of agriculture, highlighting that disaster potential (i.e., major crop yield loss) is not solely determined by the magnitude of croplands; rather, it is how croplands are distributed across the landscape that defines how risk and vulnerability are realized in a major crop loss scenario. Results from this research will inform data-driven decision-making efforts and risk communication across the agricultural community, including stakeholders in crop insurance, sustainability, and other pursuits in regional climatology.