Forecast-informed reservoir operations" (FIRO) are being explored as an option for improvement of water-supply and flood-risk management, often without major new infrastructure, in reservoirs around the Nation, and greater clarity in the use of the term is needed. This Town Hall provides an opportunity to discuss and contribute to a definition of FIRO that is being developed for the Glossary of Meteorology. The working definition now reads: "Forecast-informed reservoir operations (FIRO) is a reservoir-operations strategy that uses enhanced monitoring and improved weather and water forecasts to inform decision making to selectively retain or release water from reservoirs to optimize water supply reliability and environmental co-benefits and to enhance flood-risk reduction."