@misc{75316, author = {F. Lalaurette and Jean-Raymond Bidlot and Laura Ferranti and A Ghelli and F. Grazzini and Martin Leutbecher and David Richardson and G. van der Grijn}, title = {Verification statistics and evaluations of ECMWF forecasts in 2004-2005.}, abstract = {This document presents recent verification statistics and evaluations of ECMWF forecasts. Recent changes to the data assimilation/ forecasting and post-processing system are summarised in Section 2. Verification results of the medium-range free atmosphere ECMWF forecasts are presented in Section 3, including, when available, a comparison of ECMWF forecast performance with that of other global forecasting centres. Section 4 deals with the verification of ECMWF forecasts of weather parameters, oceanic waves and severe weather events. Finally, Section 5 provides insights into the performance of extended range forecast systems. A short technical note describing the scores used in this report is given.}, year = {2006}, journal = {ECMWF Technical Memoranda}, number = {501}, pages = {46}, month = {08/2006}, publisher = {ECMWF}, url = {https://www.ecmwf.int/node/10632}, doi = {10.21957/pzvb99ct2}, language = {eng}, }