Cornelis M. Nederhoff Li H. Erikson Jennifer Anne Thomas Patrick L. Barnard Andrea C. O'Neill 2024 Here, we describe a dataset of two-dimensional (2D) XBeach model files that were developed for the Coastal Storm Modeling System (CoSMoS) in northern California as an update to an earlier CoSMoS implementation that relied on one-dimensional (1D) modeling methods. We provide details on the data and their application, such that they might be useful to end-users for other coastal studies. Modeling methods and outputs are presented for Humboldt Bay, California, in which we compare output from a nested 1D modeling approach to 2D model results, demonstrating that the 2D method, while more computationally expensive, results in a more cohesive and directly mappable flood hazard result. application/pdf 10.3390/data9100118 en MDPI A dataset of two-dimensional XBeach model set-up files for northern California article