Due to severe flooding and disastrous natural phenomena in Poland between the years 1997 and 1998 the Institute of Meteorology and Water Management (IMGW Poland) initiated the modernization of the existing hydrological and meteorological management system. The on-going project is called "Emergency Flood Recovery Project" mainly financed by the World Bank. The system covers in the final stage the complete territory of Poland. Because of the size of the project the task plan has been divided into several sub-components. This paper describes the design of the sub-component which foresees the extension of the Polish weather radar system network POLRAD. This task includes the enlargement of the Gematronik METEOR Doppler weather radar network and the realization of a modern state-of-the-art radar Intranet including radar data processing software. In order to provide long-term rainfall forecast capabilities the integration includes additionally the adaptation to the Met Office (UK) rainfall forecast system Nimrod.