9907 typhoon depression moved northwest,came into Shandong province from Yellow Sea on August 9 night,11-12 with westerlies system interaction,and caused a heavy rain or very heavy rain in part area of Shandong.Heavy rain area located at the intersection of the southeast low-level jet,in the right side of the upper-level jet entrance and the typhoon depression moving direction,and the weak cold air of westerlies.