Use of radar observation in hydrological and NWP models : quantitative precipitation forecasts (QPF) based on radar data for hydrological models

This report gives a short overview about requirements on radar data as the base for QPF methods (section 2), focusing on requirements for the operational use of radar data (2.1.), possible impacts of limitations of the radar technique on rainfall forecasting (Appendix A) and user requiremetns (2.2.). A review of QPF methods is given in section 3 as a description of general approaches alongside with details of particular algorithms (Appendix B). Section 4 gives details on how to assess the quality of rainfall forecasts and section 5 compares different QPF methods mainly based on their performance during the World Weather Research Programme - Forecast Demonstration Project Sydney 2000.