FEWSs are difficult to implement in shared river basins because institutional fragmentation and decision-making asymmetries. Using the transboundary expansion of the SLAPIS FEWS between Niger and Burkina Faso, this study shows how an existing co-production framework can be operationally adapted to address these challenges. The paper identifies practical implementation requirements for transboundary climate services and highlights priorities for future research on evaluating their added value.

Success of weather models depends on how forecasters use and trust them. We held workshops with Norwegian forecasters to understand how they evaluate model quality and use it in their work. Forecasters rely on experience, peer discussions, and past events. They need tools that show model quality in specific situations and help them make decisions during shifts. Their views should guide tool development. This study highlights the value of collaboration between model developers and forecasters.