NAEFS = North American Ensemble Forecast System, a collaborative effort between the US (NOAA), Canadian, and Mexican Meteorological organizations.

The NAEFS is an “ensemble” model based on the Canadian MSC (Global Environmental Multiscale Model) and the US GEFS (Global Forecast System GFS -GEFS).

NAEFS forecasts extend in 3 hour increments out to 384 hours. Precipitation forecasts are in 6 hour increments.

Maps used on the are based on the statistical “mode” data version of the bias-corrected GEFS and Canadian Multiscale Global models.