“…• double mass regressions plots using cumulative rain gauge totals of the selected rain gauge and the mean of all rain gauges with (i) y-intercept set to 0 and (ii) without setting y-intercept; and • a scatter plot of the residuals from the linear regression of the cumulative rain gauge totals overlaid with a plot of the 80% residual ellipse (for more information see Martens and Smullen, 2004); 2. Event volume plots:…”