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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 15 km. Data is available for 48 vertical levels. Predictions are performed twice a day.


How to access the data

These data are available on the data server services MSC Datamart and the web services MSC GeoMet respectively :

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 these data.


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

Technical documentation

Change log

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