On March 27, 2024, the National Water Prediction Service (NWPS) website hosted at was launched replacing the legacy Advanced Hydrologic Prediction Service (AHPS) page previously located at . Resources and more information are listed below.
Public Notification Statement: November 16, 2023
Service Change Notice (SCN):January 12, 2024
SCN: March 6, 2024
NWPS Quick Start Guide
NWPS Flyer
NWPS API Flyer
NWPS Fact Sheet
NWPS Product and User Guide
Contact: nwps.webmaster@noaa.gov
Experimental FIM services are now available for 30% of the U.S. population including Puerto Rico and the U.S. Virgin Islands. These services will be to nearly 100% of the U.S. population by 2026. Experimental services depict the extent of predicted inundation, as derived from River Forecast Center forecasts and National Water Model analyses and forecasts. Services are available via the , , or directly via hosted on the Hydrologic Visualization and Information Services (HydroVIS) cloud system. Additional informational resources are available below.
Public Notification Statement (PNS)
FIM Fact Sheet
Spanish Translation Dynamic FIM Services
Stage-based CatFIM Service Summary
Frequently Asked Questions (FAQs)
Viewer Access Instructions
API Access Instructions
Viewing FIM in NWPS
Using CatFIM in NWPS
to Provide Feedback
Experimental short range, episodic, discussion and graphic which highlights locations across the nation that may be impacted by rapid-onset flooding, using National Water Model and other guidance.
High Level graphical depiction and key messages highlighting the potential threat of inland flood hazards (flash, urban, small stream and riverine) and their associated impacts (catastrophic, considerable, and limited) for the next seven days.
Experimental discussion of the current and forecast hydrologic conditions across the nation, including a variety of short and medium range (Days 1-10) observed and modeled hydrologic guidance.
Operational flood outlook intended to provide a general outlook for significant (moderate and above) river flooding. It is not intended to depict all areas of minor flooding or small-scale events such as localized flooding and/or flash flooding.
Experimental geospatial services depicting forecasts from the River Forecast Centers and the National Water Model. Services available via the prototype , or directly via URLs hosted on the cloud resource.
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