Wintertime snowpack and springtime snowmelt exert a strong influence on the volume and timing of streamflows in the western United States. Consequently, reservoir operations and decision making are challenged by the year-to-year variability in the winter and springtime hydrometeorological processes. The usefulness of hydroclimatic information for water resources management is most often limited by: (a) ready availability of snow,streamflow, temperature, and precipitation data, (b) diagnostics tools for understanding the the weather/climate-streamflow linkages, and (c) tailored metrics of hydroclimatic variables that will aid reservoir operations and decision making. We present an integrated monitoring and diagnostics framework for monitoring and predicting streamflow on weather and climate time scales. This web-based information system allows the use of monitoring and diagnostics tools in an information system allows the use of monitoring and diagnostics tools in an interactive manner.