Description:
Snow17 is a snow accumulation and melt model that has been used by the National Weather Service since the late 1970s for operational streamflow forecasting. It is a temperature-index model that was first described in Anderson (1973) before being incorporated into the NWS River Forecasting System (NWSRFS) and more recently the NWS Community Hydrologic Prediction System (CHPS). The version of the Snow17 model maintained in this directory is formulated from original NWS FORTRAN code to be compatible with the Next Generation Water Resources Modeling Framework (NextGen).
- Technology stack: The model code is written in Fortran with a driver that incorporates Basic Model Interface (BMI) commands to enable Snow17 to be run in standalone mode or as a module within the NextGen framework (or other BMI-based systems). It has been compiled using GNU, PGI, and Intel compilers.
- Status: Beta (runs but has not been extensively tested; validates against the orginal repository version listed below, which has been extensively used)
- Links: This code was adapted from source code included in https://github.com/NCAR/NWS_hydro_models -- a version used in federally funded streamflow forecasting research at NCAR. The original source code for that effort was obtained from the NWS Office of Hydrology around 2013. The code has since been copied and adapted into other research repositories.
There are no current dependencies except for a Fortran-compatible compiler (e.g., GFortran)
To build and run Snow-17 with example data, check out the INSTALL document.
See NGEN_EXAMPLE for guidance on building and running Snow17 in a model coupling framework.
Run the included test case example -- see the INSTALL document.
The restart capability has not been implemented, but will be shortly. The software has so far only been tested with the GFortran compiler (on Cheyenne at NCAR)
If there are concerns or bug fixes, etc., please file an issue in this repository's Issue Tracker.
We encourage community involvement in code development. For more info, please check out our CONTRIBUTING document.
If you wish to use or adapt the code in this repository, please make sure that your new repository credits this one as the original source of the code.
- Anderson, E. A., 1973: National Weather Service River Forecast System-Snow Accumulation and Ablation Model. NOAA Tech. Memo. NWS Hydro-17, U.S. National Weather Service. [Avail- able from Office of Hydrologic Development, NOAA/NWS, 1325 East–West Highway, Silver Spring, MD 20910.]