Significant enhancements are being planned for the Weather Surveillance Radar, 1988 Doppler (WSR-88D) Precipitation Processing Subsystem (PPS) in the near future. The Radar Operations Center (ROC) and NWS Office of Hydrologic Development (OHD) have collaborated in the development of PPS software that removes range dependent biases based on the vertical profile of radar reflectivity, more skillfully removes contamination from anomalous propagation (AP) ground clutter, refines the mitigation of radar beam blockage, removes biases caused by inadvertent operator interaction, and facilitates the operational application of new optimized radar scan strategies. The enhancements are scheduled to be deployed in the Spring of 2004.

The authors will discuss and graphically illustrate the coming PPS enhancements.