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TOC > MSC data > RDPA

Data and products of the Regional Deterministic Precipitation Analysis

The Regional Deterministic Precipitation Analysis (RDPA) produces a best estimate of the amount of precipitation that occurred over recent past periods of 6 or 24 hours. The estimate integrates data from in situ precipitation gauge measurements, weather radar, satellite imagery and numerical weather prediction models. Geographic coverage is North America (Canada, United States and Mexico). Data is available at horizontal resolution of 10 km. Data is only available for the surface level. Analysis data is made available four times a day for 6h intervals and twice a day for the 24h interval. A preliminary estimate is available approximately 1h after the end of the accumulation period, and revised 7h after in order to assimilate gauge data arriving later.


How to access the data

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

An overview and examples to access and use the Meteorological Service of Canada's open data is available. Example of a web map configured to display the quantity of precipitation [mm] over the past period of 24 hours using a Regional Deterministic Precipitation Analysis (RDPA) WMS layer served by MSC GeoMet:


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 Deterministic Precipitation Analysis is available on the Open Government Portal.


List and links to the products available for this dataset :

Analysis charts

6-hour cumulative analysis charts valid at synoptic times (00, 06, 12 and 18 UTC) and a 24-hour analysis valid at 12 UTC are available for western and eastern Canada and for the entire country.

Technical documentation


The chronology of changes to the Regional Deterministic Precipitation Analysis (RDPA) is available here.