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National Weather Service (NWS) Advanced Hydrologic Prediction Service (AHPS) River Rise Forecasts
Upper Basin Forecast Points

The NWS issues daily 48- or 72-hour forecasts for the following locations along the Delaware River:

Interactive Map (Includes locations on several tributaries as well as the four forecast points on the Delaware River listed above)

Lower Basin Forecast Points

The NWS issues daily 48- or 72-hour forecasts for the following locations along the Delaware River:

Interactive Map (Includes locations on several tributaries as well as the nine forecast points on the Delaware River listed above)

  • Forecast Services to Continue at Langhorne, Pa. (Neshaminy Creek) During Route 213 Bridge Construction - Link to NWS Statement
Flood Inundation Maps

Inundation maps provide information on the spatial extent and depth of flood waters in the vicinity of NWS river forecast locations. Users are able to display flood inundation maps for various levels ranging from minor flooding through the largest observed flood. Flood inundation maps, combined with river observations and NWS forecasts, enhance the communication of flood risk and provide users additional information needed to better mitigate the impacts of flooding and plan for more resilient communities. Flood inundation maps are now available for the following nine flood forecast locations along the Delaware River main stem:

On February 3, 2012, NWS improved all nine Delaware River flood inundation maps and user interface. Enhancements include Google maps with terrain and transportation layers, higher resolution satellite imagery, and the increased ability to zoom and pan. View the NWS public information statement for more details (pdf 56 KB).

NWS AHPS Flood Inundation Mapping 2.0 Video
Video 4