As climate change has pushed climate patterns outside of historic norms, the need for detailed projections is growing across all sectors, including agriculture, insurance, and emergency preparedness planning. This report emphasizes the needs for climate models to evolve substantially in order to deliver climate projections at the scale and level of detail desired by decision makers. Despite much recent progress in developing reliable climate models, there are still efficiencies to be gained. Evolving to a more unified climate modeling enterprise—in particular by developing a common software infrastructure and holding an annual climate modeling forum—could help speed progress.