North American Ensemble Forecast System

The North American Ensemble Forecast System (NAEFS) is a joint project involving the Meteorological Service of Canada (MSC) in Canada, the National Weather Service (NWS) in the United States, and the National Meteorological Service of Mexico (NMSM) in Mexico providing numerical weather prediction ensemble guidance for the 1- to 16-day forecast period. The NAEFS combines the Canadian MSC (Global Environmental Multiscale Model) and the US NWS global ensemble prediction systems (Global Forecast System), improving probabilistic operational guidance over what can be built from any individual country's ensemble.

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