National Water Prediction Service (NWPS) Website

The National Weather Service (NWS) is introducing the new National Water Prediction Service (NWPS), transforming how water resources information and services are delivered, and providing a greatly improved user experience through enhanced displays. The NWS has hosted river observations and forecast information on the Advanced Hydrologic Prediction Service (AHPS) web page since the late 1990s. AHPS provides near real-time river data and forecasts visualized through static maps and hydrographs, probabilistic information, static Flood Inundation Maps (FIMs) at select locations, and quantitative precipitation estimates that enable decision making. Building upon these core capabilities, dynamic and interactive hydrographs with a longer observation period, are now available via NWPS in addition to expanded mapping controls and content. NWPS includes new tools such as dynamic real-time flood inundation mapping (for an initial 10% of the U.S. population and growing to nearly 100% by 2026), greatly expanding the amount of information for making critical neighborhood scale water decisions. NWPS delivers enhanced visualization capabilities and an Application Programming Interface (API) which enables user applications to more efficiently access water resources data by leveraging modern web services