A low-pressure system has formed over northern land areas, forecasted to bring heavy rain to both northern and north-central regions, particularly impacting the Red River Delta and North Central regions with rainfall ranging from 120-250mm, and in some areas exceeding 600mm over three days. The northern mountainous areas are also expected to experience significant rainfall between 70-140mm, with some areas receiving over 370mm.
Last night and early this morning (September 10), heavy to very heavy rain was recorded in Lao Cai, Yen Bai, Hoa Binh, Phu Tho, Quang Ninh, the Red River Delta, and Thanh Hoa.
Rainfall measured from 7 PM on September 9 to 3 AM on September 10 exceeded 200mm in some locations, such as Yen Ninh (Yen Bai) 321.6mm, Dong Tam (Hoa Binh) 272.8mm, Huong Son (Hanoi) 254.2mm, and Quang Trung (Nam Dinh) 207.8mm.
According to experts, the weather conditions in the North are highly unfavorable over the next two days. A low-pressure system is forming over the Red River Delta, which could lead to exceptionally heavy rainfall across the northern mountainous and midland areas, as well as in Thanh Hoa and Nghe An provinces. The primary focus remains on the Red River Delta.
From early morning on September 10 until the night of September 10, the Red River Delta, Hoa Binh, Thanh Hoa, and Nghe An areas are expected to experience heavy to very heavy rain with scattered thunderstorms, resulting in common rainfall of 50-120mm, with isolated areas exceeding 300mm. On September 11, rainfall is expected to range from 40-90mm, with localized areas receiving over 200mm.
Hanoi and many localities will continue to experience heavy rain in the next 2-3 days.
The meteorological agency warns that on September 12, the southern part of the Red River Delta and North Central regions can expect moderate to heavy rain, with some areas experiencing very heavy rainfall, generally ranging from 20-60mm, with isolated locations exceeding 100mm.
The northern mountainous and midland regions, from early morning on September 10 until the night of September 10, are forecasted to see moderate to heavy rain, with some areas experiencing very heavy rain and thunderstorms, resulting in common rainfall of 40-80mm, with isolated areas exceeding 150mm; specifically, Lao Cai and Yen Bai are expected to see rainfall of 50-120mm, with some areas exceeding 250mm. On September 11, rainfall in this region will range from 30-60mm, with isolated areas exceeding 120mm.
Additionally, on September 10, the area from Ha Tinh to Thua Thien Hue is also expected to experience scattered showers and thunderstorms, with rainfall ranging from 15-30mm, and localized areas receiving over 70mm.
In the evening of September 10, the regions from Da Nang to Khanh Hoa, the Central Highlands, and the South will experience scattered showers and thunderstorms, with rainfall ranging from 10-30mm, and some areas exceeding 60mm. Thunderstorms may bring the risk of tornadoes, lightning, and strong winds.
The purple warning level (the most dangerous level) for landslides and flash floods continues to be recorded in many provinces/cities. (Source: http://luquetsatlo.nchmf.gov.vn/)
The North is experiencing an exceptionally heavy rainfall event that began on September 7 when the historic Typhoon YAGI swept through. The remnants of the typhoon, combined with a tropical convergence zone, continue to cause prolonged rainfall in northern provinces, particularly in the mountainous and midland areas, leading to historic flooding in many provinces/cities such as Yen Bai, Thai Nguyen, Lao Cai, Cao Bang, Son La, and Tuyen Quang. It is forecasted that the rainfall and flooding situation will remain extremely complex over the next 2-3 days.
This morning, the Flash Flood and Landslide Warning System recorded a purple warning level (the most dangerous level) in most provinces of the northern mountainous region, such as Lao Cai, Yen Bai, Ha Giang, Tuyen Quang, and Cao Bang. Many other localities in the North are recording yellow warning levels, including Hanoi, Thanh Hoa, Dien Bien, Lai Chau, and Bac Kan.
