Abstract:Based on the routine weather chart data and NCEP 1°×1°FNL grid data, it was analyzed the upper air circulation and physical features for a rare continuous autumn rain occurring in Northwest Shandong from September 26 to October 7, 2007.It is shown that the large scale circulation over Eurasia was relatively stable, a stable blocking anticyclone had been maintained nearby the Ural Mountains, the subtropical high pressure of the West Pacific was extraordinary strong, tropical cyclones were generated in the low latitude zone frequently, the positions of South Asian high and subtropical westerlies jet stream were obviously further north than normal, the short wave trough was continuously split up to move toward east in mid latitudes of Asia, and the southwest warm wet air currents of the northwest of the subtropical high continued to interact in the mid and lower reaches of the Yellow River, thus formed the 12 day long overcast and rainy weather.