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Data and Products of the Regional Deterministic Wave Prediction System (RDWPS)

The Regional Deterministic Wave Prediction System (RDWPS) produces wave forecasts using the third generation spectral wave forecast model WaveWatch III® (WW3). The model is forced by the 10 meters winds at from the High Resolution Deterministic Prediction System (HRDPS). Over the Great Lakes, an ice forecast from the Water Cycle Prediction System of the Great Lakes (WCPS) is used by the model to mitigate or suppress wave growth in areas covered by 25% to 75% and more than 75% ice, respectively. Over the ocean, an ice forecast from the Regional Ice Ocean Prediction System (RIOPS) is used: in the Northeast Pacific, waves propagate freely for ice concentrations below 50%, above this threshold there is no propagation; in the Northwest Atlantic the same logic is used as in the Great Lakes.

WW3 (WAVEWATCH III® Development Group, WW3DG 2019) is a third generation spectral wave prediction model that solves the evolution of the energy balance equation for the 2-D wave energy spectrum without any prior assumptions on the shape of the spectrum. The WW3 model has been implemented by a growing number of national operational forecasting centres over the last several years.

This system includes several domains:

  • Lake Superior
  • Lake Huron-Michigan
  • Lake Erie
  • Lake Ontario
  • Atlantic North-West
  • Pacific North-East


How to access the data

This data is available on the MSC Datamart data server service as well as MSC GeoMet:

An overview and examples to access and use the Meteorological Service of Canada's open data is available.


The end-user licence for Environment and Climate Change Canada's data servers specifies the conditions of use of this data.

MSC Open Data Service Usage Policy

The MSC Open Data Service Usage Policy determines what constitutes an acceptable use of MSC Open Data services and provides users best practices for optimal use.



List and links to the products available for this dataset :

Forecast maps

Technical documentation


The chronology of changes to the Regional Deterministic Wave Prediction System (RDWPS) is available here.