Regional Ensemble Prediction System

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 10 km. Data is available on ten vertical levels. Predictions are performed four times a day.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 17:45 (UTC)
Created	April 17, 2026, 17:45 (UTC)
contact_email	ECWeather-Meteo@ec.gc.ca
contact_person	{"en": "Government of Canada; Environment and Climate Change Canada; Meteorological Service of Canada,+01-819-997-2800,ECWeather-Meteo@ec.gc.ca", "fr": "Gouvernement du Canada; Environnement et Changement climatique Canada; Service météorologique du Canada,ECWeather-Meteo@ec.gc.ca"}
criticality_level	[]
data_dictionary	["climatology_meterology_atmosphere"]
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2022-05-02 00:00:00
open_canada_keywords	{"en": ["Probabilistic predictions", "Regional", "Ensemble", "Precipitation", "Air temperature", "Weather forecasts", "Humidity", "Snow", "Meteorological data", "Wind", "Weather and Climate", "Provide Weather Information Products and Services", "Deliver Weather Products and Services to Clients", "Meteorological Service of Canada", "Weather and Environmental Operations", "Unclassified", "International"], "fr": ["Prévisions probabilistes", "Régional", "Ensemble", "Précipitation", "Température de l'air", "Prévisions météorologiques", "Humidité", "Neige", "Données météorologiques", "Vent", "Temps et climat", "Fournir des services et des produits d'information sur les conditions météorologiques", "Livrer des produits et des services météorologiques aux clients", "Service météorologique du Canada", "Opérations météorologiques et environnementales", "Non Classifié", "Internationale"]}
open_canada_subject	["nature_and_environment", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Système régional de prévision d'ensemble
update_frequency	continual