NWPS - Nearshore Wave Prediction System

The NWPS project in Southern Region is an experimental wave modeling project. The model is ran at Southern Region Headquarters and at all Southern Region coastal forecast offices. The forecasts are produced using the using the Simulating WAves Nearshore (SWAN) wave model, the Global Real Time Ocean Forecast System (RTOFS) model for ocean currents, the Extratropical Surge and Tide Operational Forecast System (ESTOFS) model for water levels, Wave Watch III (WW3) boundary conditions, and forecaster wind grids at coastal forecast offices.

The NWPS output is used as guidance to produce marine forecasts at the coastal forecast offices. NOTE: The NWPS output is experimental and it may differ from the official forecast. For the official marine forecast  graphics on the Web go to: http://www.weather.gov/forecasts/graphical/sectors.

A description of the NWPS model output is online at:

The National Weather Service (NWS) is seeking user comments on the NWPS model experimental output through June 30, 2014. Users are encouraged to provide feedback on this experimental product by using the brief survey and comment form at:

The graphical output of the Regional NWPS run can be viewd at the link below:

SRH Gulf of Mexico NWPS Run

SRH Gulf of Mexico GFS Wind Input
SRH Gulf of Mexico RTOFS Ocean Current Input
SRH Gulf of Mexico ESTOFS Water Level Input

At the above link you will see 3-hourly forecast outputs for significant wave height in feet and peak wave direction, peak wave period, and significant swell height. In addition you will see the wind speed and direction used as input for the model.

The NWPS input data used for wind forcing, ocean current, and water level can be downloaded at the following link:

SRH SWAN input files

The GRIB2 and netCDF output of the SRH (GMEX) model run can be downloaded at the following link:

SRH Gulf of Mexico NWPS GRIB2 Output
SRH Gulf of Mexico NWPS netCDF Output

Below is a listing of the coastal forecast office participating in the NWPS Model experiment:

NOTICE TO ALL USERS -  This model is experimental and may not be available at all times. The accuracy or reliability is not guaranteed or warranted. The data are provided 'as is' and should not be used as the sole resource for decision making. Marine forecast guidance is best interpreted by a professional meteorologist who is familiar with this particular modeling system, including any model biases.

  • National Weather Service
  • Southern Region Headquarters
  • 819 Taylor Street, Room 10A06
  • Fort Worth, TX 76102
  • Page Author: NWS Fort Worth
  • Web Master: SR-SRH.Webmaster@noaa.gov
  • Page last modified: 25-Jun-2015 12:50 PM CDT
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