ECMWF data is usually produced in GRIB format. Older parameters are usually in GRIB1, while more recent parameters and all new parameters are produced in GRIB2.
Product subsetI-i-c(Atmospheric Model high resolution 10-day forecast),III-i-c(Atmospheric Model Ensemble 15-day forecast): Model levelparameters encoded inWMO FM-92 GRIB edition 2
Product subsetsI-ii, III-iv (Time Series of Weather Parameters)and Products subsetsI-iii, III-viii (Tropical Cyclones), encoded inWMO FM-94 BUFR
Data retrieved from MARS can be retrieved in GRIB or NetCDF format. Data disseminated via ECPDS cannot be delivered in alternative formats. GRIB1/GRIB2 data delivered by ECPDS can be separated into separate feeds in the PREd or upon request if you do not have access to the PREd.