Figure 5

The performance of the WSR-88D's precipitation algorithms in a tropical environment is demonstratedby comparing observed six/twelve hour cumulative rainfall amounts from LARC rain gauges (in Figure 6) to computed calues from radar algorithms. Results show that the standard algorithm (orange) seriously underestimates the rainfall rate (blue) on Oahu for the flood event of 25 January 1996. An algorithm tuned to the tropical drop-size distribution does much better (red).