National Weather Service United States Department of Commerce


The National Weather Service will have a new River Observation and Forecast Website!

For more than two decades, the National Weather Service (NWS) has delivered river observations and forecast products and services via the Advanced Hydrologic Prediction Service (AHPS). This legacy system needed to be modernized to support newer innovation with technology supported by scalable infrastructure that uses services-driven architecture. The NWS replaces AHPS with a new website, the National Water Prediction Service (NWPS). Existing AHPS content and features will be preserved and expanded within NWPS. The new site went LIVE on March 27th, 2024.

Legacy AHPS - Advanced Hydrologic Prediction Service  Experimental NWPS - National Water Prediction Service


Access the public NWPS Testing Website here: National Water Prediction Service.

The National Weather Service welcomes public feedback. Please provide feedback via the Survey Monkey link here. If you have any questions or comments on this new website service, please contact the NWS in Green Bay at