This repository contains the radar rainfall nowcasts for 1,533 rainfall events spread over 12 basins in the Netherlands, from Imhoff et al. (2020). The basins, a combination of freely draining catchments and polder areas, are: Aa, Beemster, Delfland, Dwarsdiep, Grote Waterleiding, Hupsel, Linde, Luntersebeek, Regge, Reusel, Rijnland and Roggelsebeek. More catchment information can be found in figure 1 in Imhoff et al. (2020). The nowcasts were run with the radar composite of the Royal Netherlands Meteorological Institute for the period 2008 – 2018. Subsequently, the nowcasts were clipped to the extent of one of the basins and saved.