12地大到暴雨局部大暴雨，阵风10级，过程降温6～8℃，山东将迎大范围强降雨！

Summary of Key Points Core Viewpoint - Shandong Province is expecting a significant weather event from September 15 to 17, characterized by heavy rainfall and strong winds, with potential risks for secondary disasters such as flash floods and geological hazards [1][2]. Weather Forecast - A large-scale rainfall event is anticipated, with cumulative average precipitation expected to be between 30 to 50 millimeters across the province, and localized areas receiving up to 200 millimeters [1][2]. - Specific regions such as Jinan, Tai'an, and others are forecasted to experience heavy rain, with the most intense rainfall occurring on the night of September 16 [2][3]. Wind and Temperature Changes - Wind gusts are predicted to reach 7 to 9 levels during thunderstorms, with a temperature drop of 6 to 8 degrees Celsius expected [2]. - The minimum temperature across the province is projected to be around 16 degrees Celsius on the morning of September 18 [2]. Precautionary Measures - Due to the high risk of heavy rain and strong winds, it is advised to take precautions against secondary disasters, including urban flooding and agricultural waterlogging [2][3]. - The adverse weather conditions may impact maritime activities, transportation, outdoor work, and communication facilities, necessitating enhanced preventive measures [2].