National Water Model(NWM) Stream Analysis Web Service is built by processing the analysis assimilation output of the National Water Model river network based data. All output of the river network dataset have the same geospatial extent covering all of CONUS with partial coverage into Canada and Mexico. Currently, the service contains two layers: one depicting streamflow values and the other indicating streamflow anomalies.

Each layer contains 6 sub layers each with varying levels of simplification and filtering to make visualization more performant. There is also an additional labels layer which shows known stream names at the lowest scale. The streamflow layer colorizes streams according to the rate in which water is flowing through the stream while the anomaly layer colorizes streams according to how far their flow values deviate from normal flow values. All flow values are in cubic feet per second (CFS). Model Output Version: v3.0.

Update Frequency:Every 30 minutes.

Link to Additional Information on NWM

Link to NWM graphical page

Link to metadata

Questions/Concerns about the service, please contact the DISS GIS team

Time Information:

This service is not time enabled