Environmental Modeling Center Environmental Modeling Center Environmental Modeling Center United States Department of Commerce

WAVEWATCH III® Production Hindcast, Multigrid: Feb 2005 to September 2018


The multigrid production hindcast uses the current operational multi-grid spectral wave model WAVEWATCH III® with operational NCEP winds and ice fields as input forcing fields. No wave data assimilation is performed. The model is run after the end of the month, with all available data. Output is available from February 2005 to September 2018.

Data Set Access and Validation

Multigrid Data Access (FTP)
Multigrid Data Validation

Multigrid Timeline

Multigrid Model Setup

Model Grid Descriptions

The wave model suite consists of 9 rectilinear global and regional nested grids. These grids were developed using ETOPO-1 bathymetry (Amante and Eakins, 2009), together with v1.10 of the Global Self-Consistent Hierarchical High Resolution Shoreline (GSHHS) Database. The higher-resolution grids have been masked to improve model efficiency, and only provide data near shore. See Chawla and Tolman (2007,2008) for details on the software used for developing these grids.

(click for map)
ID Nx Ny dx dy Lon0 Lat0
Global 30 minglo_30m 7203361/21/20-77.5
Arctic Ocean 30 minao_30m 720511/21/2065.0
NW Atlantic 10 minat_10m 3013311/61/62600.0
US West Coast 10 minwc_10m 2411511/61/621025
East Pacific 10 minep_10m 5113011/61/6130-20
Alaskan 10 minak_10m 4011871.5/61/614044
Gulf of Mexico and NW Atlantic 4 minat_4m 5864811/151/1526115
US West Coast 4 minwc_4m 7365261/151/1519515
Alaskan 4 minak_4m 5483912/151/1516548

Model Input

Model output

Help and hints

Here is an example of how to read GRiB files with Python: how_to_plot_grib2.txt

Here is an example Python script to read the NetCDF partition files.

Here is an example Matlab script to read the NetCDF partition files.

Here is an example Matlab script to subset the NetCDF partition files.