According to the National Center for Hydro-Meteorological Forecasting, last night and this morning (July 19), the Lai Chau, Dien Bien, Lao Cai, Tuyen Quang and Cao Bang areas had moderate to heavy rain and scattered thunderstorms, with locally very heavy rain.
Rainfall calculated from 7 pm on July 18 to 8 am on July 19, in some places over 70mm such as Thuong Son (Tuyen Quang) observation station 130.6mm, Vinh Quang 1 (Cao Bang) 82.8mm, Trung Leng Ho (Lao Cai) 79.6mm,...
The Northern mountainous region from July 19 to the night of July 20, is forecast to have moderate rain, heavy rain and thunderstorms with common rainfall of 50 - 100mm, locally very heavy rain over 250mm. Warning of the risk of heavy rain with rainfall of 100mm in 3 hours.
The Northern Midlands and Quang Ninh region in the evening and night of July 19, it is forecast to have scattered showers and thunderstorms with rainfall of 10 - 30mm, locally heavy rain over 60mm.
The midland and Northern Delta regions during the day and night of July 20, will have scattered showers and thunderstorms with rainfall of 10 - 20mm, locally heavy rain over 100mm. Rain concentrated in the late afternoon, night and early morning. From July 21, rain will gradually decrease.
In thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind. Warning level of natural disaster risk due to heavy rain, tornadoes, lightning, hail is level 1.
Regarding the hydrological situation, currently, the water level on the main rivers in the Northern region is changing slowly and below alarm level 1.
From July 19 - July 20, a flood is likely to continue to appear on rivers in the Northern region, with a flood amplitude of 2 - 4m. During this flood, the peak flood on small rivers will reach alarm level 1 - alarm level 2, some rivers above alarm level 2; upstream of the Thao and Lo rivers, the Thai Binh river system will fluctuate at alarm level 1.
High risk of flash floods and landslides occurring in mountainous and midland provinces; flooding in low-lying areas along rivers, urban areas in the Northern region.
Warning level of natural disaster risk due to floods is level 1. Floods on rivers and streams can cause flooding in low-lying areas along rivers, affecting activities such as waterway traffic, aquaculture, agricultural production, people's livelihoods and socio-economic activities.
