7月10日至8月10日为河北省主汛期,从历史洪水分析,河北省比较大的暴雨洪水,一般发生在7月下旬和8月上旬,即“七下八上”这个阶段。由于今年台风少、出现晚,河北省今年汛期降雨主要受高空槽、低层切变线、低涡底部弱冷空气、副高外围暖湿气流及贝加尔湖南下冷空气等天气系统影响,到目前为止,全省汛期降水量比常年偏少27%,各河道没有产生较大的暴雨洪水过程,如果后期仍未有台风外围作用,今年降水属偏少年份。截至目前,全省雨水情主要呈现以下几个特点。 July 10 to August 10 for the main flood season in Hebei Province, from the historical flood analysis, Hebei Province, relatively large storm floods, generally occurs in late July and early August, that is, “seven to eight on” this stage. Due to the small number of typhoons and the late appearance of this year’s rainfall, rainfall in this year’s flood season in Hebei Province is mainly affected by the weather systems such as the upper trough, the lower shear line, the weak cold air at the bottom of the low vortex, the warm and wet air at the subtropical high and the cold air in the south of Baikal, The rainfall in the whole province during the flood season is 27% less than that in normal years. There is no major storm flood in all the rivers. If the typhoon did not have the peripheral effect in the later period, the rainfall in this year is only a few years younger. Up to now, the rain show in the province mainly presents the following features.