受冷空气和副高外围暖湿气流的共同影响,2012年7月21日至22日河北省发生“96·8”以来最大一次暴雨洪水过程。保定北部、廊坊北部、承德南部、唐山北部降特大暴雨,暴雨中心王安镇降雨量378mm(最大6h降雨量274.6mm,约为200年一遇)。暴雨引发大清河、北三河、滦河水系部分河道发生较大洪水,大清河水系拒马河紫荆关水文站洪峰流量 Affected by the combination of cool air and the peripheral warm and humid air, the largest flood and flood episode since “96.8” occurred in Hebei Province from July 21 to July 22, 2012. Northern Baoding, northern Langfang, southern Chengde, northern Tangshan heavy rainfall, rainstorm center Wangan rainfall 378mm (maximum 6h rainfall 274.6mm, about once in 200 years). Heavy rains triggered a large flood in the Daqing River, the Beisan River and the Luanhe River, and the flood peak flow of the Juqing River Hydrological Station in the Daqing River waterway