Statistical Objective Analysis Scheme (SOAS) for Improving WSR-88D RainfallEstimates. Volume 1. Comparative Analysis between Stage III and the SOAS Over WSR-88D Overlapping Areas

摘要

The Bureau of Reclamation and the Oklahoma Climatological Survey at theUniversity of Oklahoma prepared volume 1 of this report to describe the SOAS (Statistical Objective Analysis Scheme) and its application to case studies in the Lake Altus area in southwestern Oklahoma. The SOAS was used to reanalyze hourly rainfall estimates from mosaiced digital rainfall arrays over the Lake Altus are using Oklahoma Mesonet rain gage data. Results indicate the current state III processing underestimates total rainfall accumulations by as much as 40 percent compared to the SOAS reanalysis. Furthermore, the largest discrepancies between the stage III rainfall estimates and the SOAS reanalyses coincided with areas of overlapping coverage between individual WSR-88D umbrellas (230 km).