Abstract: In order to improve the skill of weather forecast and provide better meteorological service for Olympic Sailing Competition, high resolution numerical model system for Qingdao Olympic Sailing Competition (including forecast model and interpretation models) is developed.Based on Weather Research & Forecast (WRF) Model Version 3.0, a forecast model is set up with gird of 60×50×38 and horizontal resolution of 500 m. It takes about 1 hour and 20 minutes to produce 15-hour forecast on an IBM computer with 8 threads, which meets the requirement of operational forecast. Dynamic interpretations to the forecast results are carried out with the aid of a high resolution Planetary Boundary Layer Model (PBLM) and an Urban Neighborhood Scale Model (UNSM) (with the horizontal resolution of 100 m and 10 m respectively).This model system runs continuously during the summer of 2008, and the model products are used in Qingdao Branch of Beijing Olympic Meteorological Service Center. Results show that, the model system is robust and practical, and performs quite well on the simulation of urban heat island and local circulations (e.g., sea-land breeze and terrain/building effects). Analyses of numerical cases indicate that urbanization leads to urban heat island, increases sea-land temperature difference, and strengthens sea-breeze. Mean-while the drag effect of urban building decreases the wind speed, and slows down the advance of sea-breeze. The introducing of fine underlying surface data is critical to high resolution numerical simulation of local circulations (e.g., sea-breeze).The dynamic interpretation to the forecast results with the aid of a high resolution PBLM with the horizontal resolution of 100 m indicates that, generally PBLM could simulate the wind field and the effects of surrounding terrain very well. The PBLM results are consistent with the observations from buoys and automatic weather stations, and have similar charaeteristies with Lidar observations. Further fine-scale dnamic interpretation in terms of UNSM with the horizontal resolution of 10 meters shows that UNSM could well simulate the wind in urban blocks. So the dynamic interpretations based on the terrain-following coordinate PBLM and the build-aware UNSM are effective to simulate the effect of local terrain and buildings on the wind in interest venues.