A simple weather generator that converts statistical information from downscaled global climate models to 24-hr precipitation input for hydrological models

Abstract. A weather generator can provide a link between downscaled precipitation or temperature statistics on the one hand, and impact models that require daily data as input on the other. A simple design for a weather generator for daily precipitation is described together with results from an evaluation against rain gauge observations from Norway, Ghana and Romania. The results from the evaluation indicate that it gives a close approximation of the observed characteristics for daily precipitation in different climatological settings. A simple weather generator for daily temperature is also presented, and an assessment of its performance also suggests a reasonable skill level. These weather generators are part of the free and open-access R-package 'esd'.