Project "Operational decision-making based on atmospheric conditions" (PROZA) started in September 2009 is created by the consortium of four partners: Interdisciplinary Centre for Mathematical and Computer Modeling (ICM), University of Warsaw, Research Institute of Pomology and Floriculture, Research Institute of Forestry, and Institute of Oceanography, University of Gdansk (IOUG). The project has been developed in a response to actual demands from economic entities. Increasing need to improve regional and local weather forecasts is based on a significant impact of a weather on many areas of the human activity. The systematic increase of the quality of forecasts based on the concentrated research in the field of numerical weather prediction gives the possibility to improve the usability and practical application of results in various fields of economy and social life. Topics implemented under the project relate both to the development of operational numerical weather prediction system and develop a range of applications for selected areas of the economy: energy, forestry, horticulture and marine management. ...