National meteorological and hydrological services have shared data for over 100 years, and the global network of monitoring instruments, databases, and forecast models is a major contributor to GEOSS. Significantly expanding the reach of this information will lead to even greater societal benefits, especially as GEOSS integrates global weather data with emerging data sets in health, energy, water management, and other fields. With weather- and climate-sensitive industries accounting for one-third of America’s GDP, or about $4 trillion, improved Earth observations leading to improved analyses and response will greatly affect the nation’s ability to keep people and property safe and secure. An integrated approach is already a cornerstone of the U.S. Tsunami Warning System, which receives real-time data from satellites following transmission from surface buoys linked to seafloor sensors.