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Sep 2020 and has been replaced by an improved GEFS-Waves,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:
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).
The Nearshore Wave Prediction System (NWPS) provides on-demand, high-resolution
nearshore wave model guidance to U.S. coastal WFOs, triggered in real time by
forecast wind grids prepared and submitted by the individual offices. NWPS is
maintained and developed by NCEP's Environmental Modeling Center (EMC) in
collaboration with a number of Weather Forecast Offices (WFOs), as well as partners
at NOAA/NOS, USGS and USACE.
NWPS is driven by forecaster-developed wind grids produced in AWIPS,
and wave boundary conditions from the operational
WAVEWATCH III model. The nearshore wave model used is
SWAN.
Wave-current interaction is included using surface currents from the
Real-Time Ocean Forecast System (RTOFS-Global).
Tides and storm surge are accounted for using the Extratropical Surge and Tide Operational Forecast System
(ESTOFS, extratropical conditions),
or the probabilistic model P-SURGE
(tropical conditions). The computational grids have a nearshore resolution of 1.8 km-500 m.
NWPS produces fields of integral wave parameters, wave spectra, and individually tracked wave
systems (Gerling-Hanson plots). Experimental rip current and total water level
guidance is produced at 5 pilot WFOs.
This tool displays experimental total water level and coastal
change model guidance for select regions of the U.S. coastline using
NWPS output and local beach characteristics (Courtesy of
U.S. Geological Survey)
Monthly Validation - Southern and Eastern Regions
Below are the combined monthly validation statistics at all coastal data buoys in
the NWS Southern and Eastern Regions respectively, computed as a 30-day, moving-window
retrospective. For real-time validation, as well as buoy-specific
validation statistics, please see the model validation viewer above.
Southern Region Validation Statistics Click to enlarge
Eastern Region Validation Statistics Click to enlarge
Southern Region Statistics History Click to enlarge
Eastern Region Statistics History Click to enlarge
Monthly Validation - Western, Pacific and Alaska Regions
Below are the combined monthly validation statistics at all coastal data buoys in
the NWS Western, Pacific and Alaska Regions, computed as a 30-day, moving-window
retrospective. For real-time validation, please see the model validation viewer above.
Western Region Validation Statistics Click to enlarge
Pacific/Alaska Region Validation Statistics Click to enlarge
Western Region Statistics History Click to enlarge
Pacific/Alaska Region Statistics History Click to enlarge
Follow Us
Sign up for the
NWPS mailing list
for updates and information on this system.
Follow the system development on our Wiki Page
(authorization required).
References
Gibbs A., G. Dusek, A. J. van der Westhuysen, P. Santos, S. Stripling, S. Huddleston, E. Rivera-Acevedo, J. Estupinan, and H. Seim. Numerical Validation of a Coupled Probabilistic Rip Current Model and Nearshore Wave Prediction System for South Florida. Proc. 95th AMS Annual Meeting,
Am. Meteor. Soc., Phoenix, 2015. Available here
Dusek G., A. J. Van der Westhuysen, A. Gibbs, D. King, S. Kennedy, R. Padilla, H. Seim, and D. Elder. Coupling a Rip Current Forecast Model to the Nearshore Wave Prediction System. Proc. 94th AMS Annual Meeting,
Am. Meteor. Soc., Atlanta, 2014. Available here
Van der Westhuysen, A. J., A. A. Taylor, R. Padilla-Hernandez, A. Gibbs, P. Santos, D. Gaer, H. D. Cobb III, J. R. Lewitsky, and J. R. Rhome. Enhancements to the Nearshore Wave Prediction System to provide Coastal and Overland Hurricane Wave Guidance. Proc. 94th AMS Annual Meeting,
Am. Meteor. Soc., Atlanta, 2014. Available here
Van der Westhuysen, A. J., R. Padilla-Hernandez, P. Santos, A. Gibbs, D. Gaer,
T. Nicolini, S. Tjaden, E. M. Devaliere and H. L. Tolman. Development and validation
of the Nearshore Wave Prediction System. Proc. 93rd AMS Annual Meeting,
Am. Meteor. Soc., Austin, 2013. Available here
Gibbs, A., P. Santos, A. J. van der Westhuysen and R. Padilla-Hernandez.
NWS Southern Region Numerical Optimization and Sensitivity Evaluation in Non-Stationary
SWAN Simulations. Proc. 92nd AMS Annual Meeting, Am. Meteor. Soc.,
New Orleans, 2012. Available here
Settelmaier, J. B., A. Gibbs, P. Santos, T. Freeman, D. Gaer. Simulating
Waves Nearshore (SWAN) Modeling Efforts at the National Weather Service
(NWS) Southern Region (SR) Coastal Weather Forecast Offices (WFOs).
Proc. 91st AMS Annual Meeting, Am. Meteor. Soc., Seattle, 2011.
Available here
Upcoming features: Unstructured meshes
SWAN and WW3's unstructured grid functionality is currently being
incorporated into NWPS. With flexible unstructured grids, computational
time can be optimized by concentrating computational grid points only in
those nearshore regions where it is required to adequately resolve physical
processes at small spatial scales, as shown in the examples below. This
new functionality is scheduled for September 2017.
Unstructured mesh over WFO Key West domain. Click to enlarge
Forecast guidance produced using NWPS (with SWAN wave model). Click to animate
Zoom of unstructured mesh over Key West. Click to enlarge
Forecast guidance over zoomed-in domain. Click to animate.
www.nws.noaa.gov 
)
)
)
)
)
)
)
)
)
)
)
)