GWESCurrently selected. The Global ocean Wave Ensemble forecast System (GWES) provides wave forecasts from 21 wave models run simultaneously using winds from NCEP's Global Forecast System GFS (control member) and from the Global Ensemble Forecast System GEFS (20 perturbed members). The GWES is run 4 times daily based on 0000, 0600, 1200, and 1800 UTC start time and provides predictions to 240 hours.