Probabilistic river stage forecasts are being made using alternative techniques to process probabilistic precipitation forecast information. This is being done in a project to demonstrate national Weather Service capability to produce probabilistic forecasts for 3 river forecast points in the upper Monongahela river basin. The probabilistic precipitation forecasts are produced by Weather Forecast Offices at Charleston, WV and Pittsburgh, PA. One of the alternative techniques to make probabilistic stage forecasts is Ensemble Streamflow Prediction (ESP). Recent experience in the demonstration project using this technique will be presented