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The service provides a repository of meteorological and hydrological data, including recorded weather conditions and streamflow measurements from a number of widely distributed research sites. It is intended to meet the needs of researchers tracking long-term trends in precipitation and other weather conditions against surface water supplies in a region. API methods support access to either raw data or aggregated data for extended time periods. Raw data available include data for a specific site on a particular day along with the date when data were last recorded there. Aggregated data available include monthly, yearly, and overall data recorded for all recording stations.