NWM — NOAA National Water Model
Hourly hydrologic forecast at every NHDPlus stream reach (~2.7M reaches) in CONUS. Analysis-Assimilation runs hourly with 3-hour and short-range (18h), medium-range (10d), and long-range (30d ensemble) configurations. The natural input for parametric flood triggers and flash-flood validation.
| Provider | NOAA Office of Water Prediction |
|---|---|
| Delivery mode | stream |
| CNR score | 80 |
| Cadence | PT1H |
| Origin | https://water.noaa.gov/about/nwm |