Climate Forecast System (NCEP)
The Climate Forecast System or coupled forecast system (CFS) is a medium to long range numerical weather prediction and a climate model run by the National Centers for Environmental Prediction (NCEP) to bridge weather and climate timescales. Version 2 became operational as CFSv2 in 2011.
Source: Wikipedia — Climate Forecast System (NCEP) (CC BY-SA 4.0)