In the past month, the rainfall in Beijing-Tianjin-Hebei and northeast China has been significantly higher than that in the same period of the year. It is expected that from August 20 to 22, there will be a large-scale rainfall process from west to east in the central and eastern parts of the mainland, with moderate to heavy rain in northern China and heavy rainfall in northeast China. Affected by this, some rivers in the Songhua River and Haihe River basins will have a water rise process, flood control pressure will still be large, and some farmland in Heilongjiang and Jilin will have a high meteorological risk of waterlogging. It is recommended that North China and Northeast China continue to strengthen flood prevention and flood relief work, strengthen river embankment inspections, and pay attention to preventing strong convective weather hazards such as thunderstorms, strong winds, hail, etc. In addition, there is heavy rainfall in southern Shaanxi, Sichuan Basin and other places, and it is recommended to do a good job of prevention of secondary disasters caused by heavy rainfall.
It is expected that from August 20 to 22, there will be a large-scale rainfall process from west to east in most of the central and eastern parts of the mainland, with moderate or heavy rain in most areas, including heavy rainfall in southern Shaanxi, southern Sichuan Basin, northern Yunnan, southeastern Tibet and southeastern Hubei, northeastern Hunan, southern Anhui, northern Jiangxi, western Zhejiang, western Heilongjiang, western and southeastern Jilin, eastern Liaoning and other places, with a cumulative rainfall of 50 to 80 mm, and heavy rainfall in the southern part of the Sichuan Basin, with a cumulative rainfall of 100 to 150 mm; Maximum hourly rainfall 30 to 60 mm; The central and eastern parts of Inner Mongolia, northern China, and western northeast China are accompanied by strong convective weather such as thunderstorms, strong winds or hail. The main rainfall period in North China is on the 20th, and in Northeast China on the 21st.
Rainfall forecast for the Songliao River Basin: From the 20th to the 22nd, the rainfall in most parts of the Songliao River Basin will be 5 to 15 mm, 20 to 28 mm in the middle and lower reaches of the Nenjiang River, the Lalin River and the Hulan River and the lower reaches of the Liao River in the Songhua River, and 28 to 33 mm above the Songhua Lake in the Songhua River.
Forecast of surface rainfall in the Haihe River Basin: From the 20th to the 22nd, the rainfall in the north and east of the Haihe River Basin exceeded 10 mm, of which the surface rainfall of the Yongding River, the upper reaches of the Chaobai River, the lower reaches of the Chaobai River and the North Canal, Jixian Canal, and the main stream of the Haihe River was 13 to 28 mm.
Meteorological experts remind that at present, the soil water content in North China and Northeast China is saturated, and some rivers in the Songliao and Haihe River basins continue to operate at high water levels. Affected by the new round of rainfall process, there are still risks of floods, flash floods and geological disasters in the above-mentioned areas, and it is recommended that all localities closely monitor changes in rain, water and flood conditions, strengthen patrols and inspections of weak embankments and key embankments, and continue to do a good job in flood prevention and flood relief. In addition, North China and Northeast China also need to pay attention to preventing strong convective weather hazards such as thunderstorms, strong winds, hail, etc.
Shaanxi, Sichuan, Yunnan, Tibet and other places have the risk of heavy rain disasters, it is recommended that mountainous areas strengthen the monitoring and early warning of flash floods and geological disasters, and the inspection and elimination of hidden danger points, so as to timely transfer the people in dangerous areas.
Source: Central Meteorological Observatory
Editor: Zhang Linhao Review: Zhang Qian