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TOC > MSC data > REPS

Data and Products of the Regional Ensemble Prediction System (REPS)

The Regional Ensemble Prediction System (REPS) carries out physics calculations to arrive at probabilistic predictions of atmospheric elements from the current day out to 3 days into the future. The probabilistic predictions are based on 20 ensemble members that are perturbed through their initial and boundary conditions as well as physical tendencies. A control member that is not perturbed is also available. Atmospheric elements include temperature, precipitation, cloud cover, wind speed and direction, humidity and others. This product contains raw numerical results of these calculations. Geographical coverage includes Canada and the United States. Data is available at a horizontal resolution of 15km and 10km on 24 vertical levels. Predictions are performed four times daily.


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.


The metadata of the Regional Ensemble Prediction System are available on the Open Government Portal

Technical documentation


The chronology of changes to the Regional Ensemble Prediction System (REPS) is available here.