The dense rain gauge network of the WGEW [Goodrich et al., 2008] provided rainfall data from 11 gauges in and near WG11, and discharge data for flume 11 (available at http://www.tucson.ars.ag.gov/dap/, see Table 2). The breakpoint instantaneous discharge data (finest resolution being 1 min) was converted to radar time step values by averaging over time windows delineated by the midpoints of the radar time steps; this was judged to represent the original data time series better. Basin-averaged cumulative gauge rainfall calculated for selected events using Thiessen polygons and corresponding observed hydrographs are shown in Figures 2 and 3, respectively