The USAF 557th Weather Wing’s operational Global Hydro Information (GHI) system serves as the U.S. Government’s authoritative source for global hydro-intelligence information. GHI is powered by NASA’s Land Information System (LIS). LIS is a flexible land surface modeling and data assimilation framework designed using advanced software engineering principles. Structured to enable community sharing and the reuse of modeling tools, data resources, and assimilation algorithms, the LIS infrastructure provides modeling tools to integrate satellite- and ground-based observational data products and advanced land surface modeling techniques to produce optimal fields of land surface states and fluxes.