OWP NWM Map Viewer

The Office of Water Prediction (OWP) National Water Center offers water-related data through the National Water Model (NWM) version 3.0, including streamflow and soil saturation, plus snow depth and snow water equivalent from the National Snow Analysis. These mapping interfaces, products, and web services are experimental and under continuous improvement. Feedback is encouraged to enhance quality and availability. The OWP also directs users to official National Weather Service water information sources for river observations, snow data, and precipitation frequency estimates.