National Weather Service United States Department of Commerce

The National Weather Service has a new rivers and lakes observation and forecast website!

The AHPS site will be replaced with this new site on May 28th, 2024.

For more than two decades, the National Weather Service (NWS) 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 and provide a more mobile-friendly user experience. On May 28, 2024 the NWS will replace AHPS with a new website, the National Water Prediction Service (NWPS). This new site can be viewed here: https:/ Please update your bookmarks accordingly.

Previous: Advanced Hydrologic Prediction Service (AHPS) New: National Water Prediction Service (NWPS)

NWPS will be accessible at The former AHPS link ( will redirect to this new page for a limited time.  Again, please update any of your bookmarks.

Additional NWPS resources:

For any comments or questions, please contact: