台风白海豚中心已于11日5时移入安徽安庆市境内[1]，外围最大风力达8级[1]，预计以每小时15至20公里的速度向西偏北方向移动[1]。中国中央气象台11日同时发布暴雨橙色预警、强对流天气蓝色预警和台风蓝色预警[1]。
受台风白海豚和西风槽共同影响，未来3天浙江东部、江苏西部和南部、安徽、湖北、湖南北部、河南、山东西部、河北中南部、山西东南部、北京中南部、内蒙古中西部等地将出现暴雨或大暴雨[1]。部分地区最大风力可达11级以上，局地不排除出现龙卷风的可能性[1]。北京发布今年汛期第2个暴雨橙色预警信号，大兴、通州等7区升级到暴雨红色预警[1]。其中房山、大兴、通州、门头沟部分地区的累计降雨量将达到特大暴雨程度[1]。
China's Central Meteorological Administration issued simultaneous orange alerts for torrential rain, blue alerts for severe convective weather, and blue alerts for typhoons on August 11 as Typhoon Baihaitun moved into Anhui Province [1]. The typhoon's center was located within Anhui's Anqing city at 5 a.m. on August 11, with maximum peripheral winds reaching force 8, and was forecast to move westward and northward at a speed of 15 to 20 kilometers per hour [1].
Over the next three days, influenced by both Typhoon Baihaitun and westerly troughs, multiple provinces spanning from coastal Zhejiang and Jiangsu to inland regions including parts of Inner Mongolia and Shanxi will experience torrential rain or exceptional downpours [1]. Affected areas include eastern Zhejiang, western and southern Jiangsu, Anhui, Hubei, northern Hunan, Henan, western Shandong, central and southern Hebei, southeastern Shanxi, central and southern Beijing, and central and western Inner Mongolia [1]. Some regions are expected to see maximum wind speeds exceeding force 11, with local areas unable to rule out the possibility of tornadoes [1].
Beijing has issued its second orange torrential rain alert of the flood season, with seven districts including Daxing and Tongzhou upgraded to red alerts for torrential rain [1]. The capital is expected to experience cumulative rainfall reaching torrential levels, with Fangshan, Daxing, Tongzhou, and Mentougou districts in some areas potentially facing exceptional downpours [1].