En français

ECCC logo

TOC > MSC data > HREPA

Data and Products of the High Resolution Ensemble Precipitation Analysis (CaPA-HREPA)

The High Resolution Ensemble Precipitation Analysis (HREPA) is part of the NSRPS (National Surface and River Prediction System) experimental system dependent on two other systems. It uses surface station observations and radar QPEs pre-processed by the High Resolution Deterministic Precipitation Analysis (HRDPA) and disturbed trial fields generated by the Canadian Land Data Assimilation System (CaLDAS). HREPA produces four precipitation analyses per day on 6-hour accumulations valid at synoptic times (00, 06, 12, and 18 UTC). Each analysis set contains 24 members plus the control member. A quality index (confidence index) is also available on the same grid as the precipitation fields. Finally, two percentiles, 25th and 75th, estimated on these sets are also provided for each synoptic hour. Currently, there is only a high-resolution version of the system, whose domain covers Canada and the northern United States with a horizontal resolution of about 2.5km.


How to access the data

This experimental data is available on the MSC testing data repository DD-Alpha:

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 High Resolution Ensemble Precipitation Analysis [experimental] is available on the Open Government Portal.

Technical documentation


The chronology of changes to the high resolution ensemble version of the Canadian Precipitation Analysis System (CaPA-HREPA) is available here.