Global Ensemble Ocean Wave Forecast System (Text)


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The global wave ensemble system (GWES) has been providing operational wave forecasts for the US National Weather Service (NWS) since 2008. The GWES consists of a 20-member ensemble forced with NCEP-GEFS bias-corrected wind data, and one control run with NCEP’s deterministic GFS model.

After upgrades undertaken in July 2014, the GWES runs on a spherical grid with 1/2° resolution in longitude and latitude, and uses an efficient wave-generation physics package following Ardhuin et al. (2010). The current system provides high-quality deep-water wave forecasts, also generating products for applications in nearshore areas and under hurricane forcing conditions, a feature that results from a close interaction between three NCEP centers: the Environmental Modeling Center (EMC), the National Hurricane Center (NHC), and the Ocean Prediction Center (OPC).

Access the Global Wave Ensemble System product viewer

The viewer controls allow you to select from the last 5 days at the run times of 00Z, 06Z, 12Z, and 18Z. Spaghetti and Probability maps include a control to select a threshold value for the selected parameter.

The US National Weather Service also generates operationally a combined wave-height ensemble product in partnership with the Fleet Numerical Meteorology and Oceanography Center (FNMOC) of the US Navy. The combined wave ensemble data are at the NFCENS page.


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Page last modified: Tuesday, 04-Oct-2016 20:41:52 UTC