Figure 3. Four-panel display of the KHGX WSR-88D at 1300 UTC 19 March 1999. (a) The Stage I unbiased HDP estimate (note area of anomalous propagation). (b) The Stage II adjusted radar with the bias applied to the radar rainfall estimates (note area of "AP" also exists on the Stage II display). (c) Gauge-Only field showing 1-h rainfall reports. Gauges GBHT2, HBAT2, and WHAT2 had the heaviest rainfall amounts. (d) Multisensor field, which blended the Stage II adjusted radar and the gauge-only fields. Note the "AP" has been removed from extreme southeast Texas. The applied Stage II bias is circled toward the bottom.