Comparison of NWP prognosis and local monitoring data from NPPs

For four German nuclear power plant sites and for Risø, the site of the Danish nuclear research reactors now being decommissioned, Numerical Weather Predictions (NWP) of wind speed and direction have been compared to 10 minute averaged local measurements. For the German sites the comparison covers data for approximately three month, January to March 2009, for the Risø site for approximately two thirds of the year October 1998 to September 1999. For each site the comparison has been made for all measurement levels and both for the NWP analysis time and for the maximum available forecast time. Means and standard deviations of NWP minus measured data are given as tables for all measurement levels while scatter plots are presented for only a single measurement level at analysis time at each site. For Risø and for the site close to the North Sea plus for the inland site Philippsburg the predictions of wind speed are on average rather close to the measured, but for sites not far from the latter two, Krümmel respectively Obrigheim, the discrepancies are substantial. © EDP Sciences, 2010