Flood Resources Portal
AHPS River Rise Forecasts

The National Weather Service's Advanced Hydrologic Prediction Service (AHPS) is an online tool for accessing real-time (observed) and forecasted streamflow and gage height information for specific flood forecast points.

AHPS incorporates streamflow, radar and runoff modeling to provide updated, graphical flood forecast information.

In normal (non-flood) conditions, these pages are updated every 1-3 days; during times of flood, updates occur several times a day.
AHPS Flood Forecast Points: Upper Basin

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

Interactive Map (Includes locations on several tributaries as well as the four flood forecast points on the Delaware River listed above)
AHPS Flood Forecast Points: Lower Basin

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)
Flood Inundation Maps

Flood inundation maps provide information on the spatial extent 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 as well as the Assunpink Creek at Trenton, N.J. :
Additional Resources