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WAVEWATCH III® Production Hindcast, Multigrid: Feb 2005 to May 2019


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 May 2019.

UPDATE: 21 Dec 2020
EMC's WAVEWATCH III global wave model Multi-1 will be decommissioned in NCEP operations in February 2021. It is being replaced by a new configuration of global wave model coupled to GFS v16. Details of GFS v16 are available here. There is a plan in place to run the GEFS v12 wave model reanalysis/reforecasts for a period of 20 years starting in 1999. Details on these will be made available later.

Data Set Access and Validation

Multigrid Data Access*
Multigrid Data Validation

* Important Note: The Production Hindcast data set was recently moved from our FTP server to our web server. Please update your bookmarks and links as needed with the new location.

Some browsers (Firefox, Chrome) may try to display the contents of a GRiB file in the browser window instead of downloading it. If that happens, right-click on the GRiB file link and select "Save Link As..." to download the file.

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.