The CMC Numerical Output Database

Meteorological data in GRIB format

The Meteorological Service of Canada makes this GRIB2 format database available to private sector meteorologists, academics, and the general public. It contains data from analysis systems along with output from many of the Canadian Meteorological Centre's Numerical Weather Prediction (NWP) models. The data is free, under standard terms and conditions.

There are two main sections in the database:

• A section offering analysis data
• A section offering NWP model data which has two types of data available:
  • A low resolution NWP database, containing model output that has been interpolated to a coarser grid than the model's native grid. This reduces the size of the dataset while preserving ample information for many purposes.
  • A high resolution NWP database, containing model output that has been interpolated on a regular grid of similar resolution to the model's native grid. This larger dataset is suitable for applications where the finer details of model output are required.

For more information, please read our description of the GRIB format.

Dataset description and access

If you make use of Environment Canada GRIB data, we encourage you to subscribe to our distribution list in order to receive timely information regarding future changes that may have an impact on the way you collect or use our data : http://lists.ec.gc.ca/mailman/listinfo/dd_info

GRIB2

• Analysis Data
  • Regional Deterministic Precipitation Analysis - RDPA CaPA
• Numerical Weather Prediction Data
  • High resolution
    • North American Ensemble Forecast System - NAEFS
    • Global Deterministic Prediction System - GDPS
    • Regional Deterministic Prediction System - RDPS
    • High Resolution Deterministic Prediction System -HRDPS
  • Low Resolution
    • Global Deterministic Prediction System - GDPS
    • Regional Deterministic Prediction System - RDPS