Skip Navigation Links www.nws.noaa.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
Environmental Modeling Center
 
 

Local forecast by
"City, St" or Zip Code

 

NOAA Wave Watch III logo Click here for the MMAB home page

NWW3 Data Access

IMPORTANT NOTICE REGARDING THE WAVEWATCH III® MULTI-1 WEBSITE

The EMC WAVEWATCH III® global wave model Multi-1 was decommissioned in NCEP operations on March 22, 2021. It has been replaced by a new configuration of the WAVEWATCH III global wave model, called GFS-Wave, and coupled to the Global Forecast System (GFSv16), as part of the Unified Forecast System.

THIS WEBSITE IS NOT DISPLAYING MULTI-1 OR GFS-WAVE GRAPHICS

It is being maintained for archival and verification purposes only.

Here are the details (PDF) on how this will affect users of this site.

Output of the new GFS-Wave model is available on NOMADS and Production FTP

*under gfs.YYYYMMDD/CC/wave/gridded and gfs.YYYYMMDD/CC/wave/station

Graphics of the GFS-Wave model output will become available some time in April on the Model Analysis and Guidance (MAG) site under GFS-Wave. Note that the current WW3 link on that page is to the discontinued Multi-1 wave model and will not be updated.

NOTICE: The Global Wave Ensemble System (GWES) was discontinued on 23 Sep 2020 and has been replaced by an improved GEFS-Waves, consisting of a one-way nesting of the WAVEWATCH III system with the recently upgraded GFS Ensemble Forecast System. The NOAA press release on the upgrade is here, and information on GEFS is available here.

The GEFSv12 Service Change Notice (issued 8/20/2020, PDF) is here, and you can find information on the evaluation of the GEFS-Waves portion of the GEFS system in the Model Evaluation Group (MEG) Summary page on the GEFSv12 upgrade here.

The model data is available four times a day (0, 6, 12, 18)Z from:
  • Production FTP (gefs.YYYYMMDD -->cycle-->waves)
  • NOMADS (Ocean Models-->GFS Ensemble Wave-->(grib filter or https file download).
Details on the products can be found here (scroll down to GEFS - Wave - Global).
Home Product
Viewer
Product
Table
Product
Descriptions
Model
Description
Model
Validation
Model Data
Access

Model data from the latest NOAA WAVEWATCH III® runs is available in GRIB (GRIdded Binary) format on the Marine Modeling and Analyses Branch FTP server, the NCEP NOMADS GDS/DODS data server, and the NCEP Central Operations Production FTP server, at the following URLs:

  • Current Data (WAVEWATCH III® multigrid latest version)
    1. FTPPRD (NCO Production FTP Server, today and three days prior.)
    2. MMAB FTP (Marine Branch FTP server, last six runs)
    3. NOMADS (in Ocean Models) (present + 1 week archive)

  • Current Data (WAVEWATCH III® ensemble)
    1. MMAB FTP (Marine Branch FTP server, today and three days prior)

  • Archived Data (WAVEWATCH III® Production Hindcast)
    1. MMAB FTP (Marine Branch FTP server, 1999 - 2018)
    2. NODC THREDDS (NODC Archive, 2005 - 2018)

Notes and Information on Using WAVEWATCH III® Model Data

GRIB

The operational data file format is GRiB (GRIdded Binary). Additional information on the use of GRiB at NCEP is available here.

To work with WAVEWATCH III® GRiB, any standard tools which read GRiB will work. One such tool is the freely available wgrib2 utility. The wgrib2 home page and software is here.

For analyzing the model data in MATLAB® we recommend the NCTOOLBOX for MATLAB. NCTOOLBOX can read NetCDF, OPeNDAP, HDF5, GRIB, GRIB2, HDF4 and many (15+) other file formats. The complete list of formats is available here.


EMC/MMAB Information Topics:
WAVEWATCH III® Products, All Products, About Us, Contact Us
NOAA/ National Weather Service
National Centers for Environmental Prediction
Environmental Modeling Center
Marine Modeling and Analysis Branch
5830 University Research Court
College Park, MD 20740
About Us
Disclaimer
Credits
Career Opportunities
Glossary
Privacy Policy
Comments/Feedback
Page last modified: Thursday, 13-Dec-2018 15:46:45 UTC