The National Centers for Environmental Prediction (NCEP) North American Ensemble Forecast System (NAEFS) is run jointly by the U.S. National Weather Service and Meteorological Service of Canada to provide a large, bias-corrected global ensemble as part of a multi-national agreement between the United States, Canada, and Mexico. NAEFS is run four times a day: 00Z, 06Z, 12Z, and 18Z. Each run produces forecast files every 3 hours from initial time out to 192 hours, and then every 6 hours out to 384 hours.
Additional Information:
Verification of NAEFS version 7.0 is shown here as part of the NAEFSv7 Official Evaluation (June-July 2023). The current operational version of NAEFS is version 6.1.
Verification is provided by the EMC Verification System (EVS), which uses METplus.