This site displays images from the EVS parallel run by NCO.
The National Centers for Environmental Prediction (NCEP)'s Global Forecast System (GFS) is the cornerstone of NCEP's suite of numerical guidance, providing global atmospheric and wave predictions at 13 km resolution. The GFS is used for initial and/or boundary conditions for other NCEP production suite forecast systems for regional, ocean and wave prediction. The Global Data Assimilation System (GDAS), which run a 4D hybrid ensemble-variational data assimilation scheme, produces initial conditions for the GFS forecast. The Environmental Modeling Center (EMC) is responsible for the enhancements, transitions-to-operations, and maintenance of the GFS. The global data assimilation and forecasts are made four times daily at 0000, 0600, 1200 and 1800 UTC by NCEP Central Operations (NCO). More information about the GFS can be found here, and a history of the GFS can be found here. The current operational version of the GFS is version 16.3 as of 2022 November 29. The service change notice can be found here.
Verification for the operational GFS and other operational global deterministic models can be found by navigating the links to the left. The verification is done using the EMC Verification System (EVS), which uses METplus.