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Assimilating Doppler velocities into numerical models has made positive impacts on track and intensity predictions for tropical cyclones.In recent years, a single-Doppler wind retrieval method, called the Ground Based Velocity-Track Display technique (GBVTD), has successfully retrieved realistic two-dimensional primary circulations of landfalling typhoons/hurricanes at different altitudes.The GBVTD-derived winds from the coastal operational radar at Wenzhou, China were assimilated over a 2-hour period before Saomai landfall, using the ARPS 3DVAR/cloud analysis through 30-min assimilation cycles.This study explores the impacts of assimilating GBVTD-retrieved winds on 12-hour forecast of Super Typhoon Saomai (2006), the most intense landfalling typhoon ever recorded in China.