Abstract: Using 10-day forecast 500 mb height data from the last 7 yr, the potential to predict the skill of numerical weather forecasts is discussed. Four possible predictor sets are described. The first, giving the consistency ...

Abstract: The North Atlantic blocking case of 17?30 December 1978 is briefly described synoptically and the results from several 10-day integrations of the ECMWF global numerical model are investigated to assess the role played in ...

Abstract: Cyclogenesis induced by an isolated mountain chain in a baroclinic flow is simulated in a channel version of the HIBU (Mesinger-Janji?) primitive equation model. The main features characteristic of cyclogenesis in the Ice ...

Abstract: Seven years of analyses and forecasts from the operational archives of the European Centre for Medium-Range Weather Forecasts have been analyzed to assess the performance of the model in forecasting blocking events. This ...

Abstract: Results from a 3 1/2-yr experimental program of extended-range integrations of the European Centre for Medium-Range Weather Forecasts (ECMWF) numerical weather prediction model are summarized. The topics discussed include ...