Latest version: CY41R2 operational since 8/03/2015 (included):
ECMWF Model Description
Latest version: CY41R1 operational since 14/05/2015 (included):
ECMWF Model Description CY41R1
Old versions: CY40R1, operational before 14/05/2015 (excluded):
ECMWF model description before 14/05/2015