NASA Data Feeds River Forecasts as Snow Drought Effects Linger

A recent map created using NASA's GEOS system illustrates an atmospheric river that reached Washington state in December 2025, during a winter characterized by intense rainfall and a lack of mountain snow. This snow drought, which began in the western United States in 2026, continues to impact the region. NASA Earth data is now being utilized to develop machine-learning forecasts that assist in decision-making regarding water, power, and public safety for Washington state.

Tacoma Power, a Washington public utility, is employing river-flow forecasts from a U.S. technology company as the area experiences extreme water conditions on the Cowlitz River. The utility's largest hydroelectric project generates enough electricity to support over 151,000 homes each year using the water stored behind Mayfield and Mossyrock dams.

Upstream Tech's HydroForecast system incorporates weather forecasts, river measurements, and NASA-produced satellite data on snow cover and vegetation conditions to forecast river flow from hours to days in advance. These forecasts are updated every two hours and are utilized by reservoir managers, hydropower producers, water utilities, and government agencies to prepare for storms, plan reservoir water releases, and manage dry periods.

Erin Urquhart, manager of NASA's Water Resources program, stated that NASA's mission is to make the view from space beneficial on the ground. When a U.S. company integrates NASA's freely available data into forecasts that aid water managers in preparing for floods, generating power, and managing water supplies, NASA successfully imparts practical value to the nation.