|Title||Evaluation of ECMWF forecasts, including the 2021 upgrade|
|Publication Type||Technical memorandum|
|Secondary Title||ECMWF Technical Memoranda|
|Authors||Haiden, T, Janousek, M, Vitart, F, Ben-Bouallegue, Z, Ferranti, L, Prates, F|
The most recent change to the ECMWF forecasting system (IFS Cycle 47r2, on 11 May 2021) is summarised in section 2. The description of changes and meteorological impacts from this upgrade largely follows the ECMWF Newsletter article of Rodwell et al. (2021). Verification results of the ECMWF medium-range upper-air forecasts are presented in section 3, including, where available, a comparison of ECMWF’s forecast performance with that of other global forecasting centres. Section 4 presents the verification of ECMWF forecasts of weather parameters and ocean waves, while severe weather is addressed in section 5. Finally, section 6 discusses the performance of monthly and seasonal forecast products.