According to the National Steering Committee for Natural Disaster Prevention and Control, on the morning of July 13, the northern mountainous region had scattered showers and thunderstorms, with localized heavy rain ranging from 10-30mm, and some places over 50mm.
In the evening and night of July 13, the Northern, Central Highlands, and Southern regions had scattered showers and thunderstorms, with localized heavy to very heavy rain ranging from 15-30mm, and some places over 80mm.
During thunderstorms, there is a possibility of tornadoes, lightning, hail, and strong gusts. Localized heavy rain may cause flash floods on small rivers and streams, landslides on steep slopes, and flooding in low-lying areas. Be cautious of heavy rain in a short period causing urban flooding.
The National Steering Committee for Natural Disaster Prevention and Control also stated that on July 13, the sea area from Khanh Hoa to Ca Mau, the southern part of the Central East Sea, and the southern East Sea (including the Spratly Islands) had strong southwest winds at level 6, sometimes level 7, with gusts at levels 8-9; sea waves were 2.0-4.0m high; the sea was very rough.
The Central and Southern East Sea areas (including the Spratly Islands), the sea area from Binh Dinh to Ca Mau, Ca Mau to Kien Giang, and the Gulf of Thailand had strong showers and thunderstorms. During thunderstorms, there is a possibility of tornadoes and strong gusts at levels 7-8.
The sea area from Ca Mau to Kien Giang and the Gulf of Thailand had sea waves 1.5-2.5m high. From July 13-14, a low-pressure area is likely to form on the tropical convergence zone passing through the Central East Sea.
On July 13, the North and Central Central regions had hot weather, with some places experiencing intense heat with the highest temperatures commonly ranging from 35-37 degrees, and some places over 37 degrees.
Regarding rain situation, from 7 PM on July 11 to 7 PM on July 12, the Northern, Central Highlands, and Southern regions had moderate to heavy rain, with common rainfall ranging from 30-60mm; some stations recorded higher rainfall such as: Viet Lam (Ha Giang) 113mm, Muong Bang (Son La) 90mm, Minh Quang (Tuyen Quang) 74mm, Co Lung (Thanh Hoa) 74mm, Gian Khau (Ninh Binh) 137mm, Loc Ngai (Lam Dong) 71mm, Dong Ban (Tay Ninh) 83mm.
Night rain from 7 PM on July 12 to 7 AM on July 13, the Northern and Central Highlands regions had moderate to heavy rain, with some places experiencing very heavy rain, with common rainfall ranging from 20-60mm; some stations recorded higher rainfall such as: Viet Quang (Ha Giang) 136mm, Linh Ho (Ha Giang) 126mm, Ha Lang (Tuyen Quang) 114mm, Mieu Mon (Hanoi) 69mm, Dak Ngo (Dak Nong) 79mm.
Rain for 3 days from 7 PM on July 9 to 7 PM on July 12, the regions across the country had rain, with common total rainfall ranging from 60-100mm; some stations recorded higher total rainfall such as: Viet Lam (Ha Giang) 332mm, Linh Ho (Ha Giang) 306mm, Che Tao (Yen Bai) 153mm, Chien Cong (Son La) 149mm, Ho Suoi Dau (Khanh Hoa) 160mm, Rach Gia (Kien Giang) 244mm.
Regarding the hydrological situation, rivers in the Northern region: The water level of the Red River in Hanoi and the Thai Binh River at Pha Lai station changed slowly with a downward trend and was affected by the tide; the water level at 7 AM on July 13 on the Red River at Hanoi station was 3.92m; on the Thai Binh River at Pha Lai station was 1.47m.
Forecast until 7 AM on July 14, the water level at Hanoi station is likely to be at 3.6m; in the next 36 hours, the highest water level at Pha Lai is likely to be at 1.7m and the lowest at 0.95m.
Rivers in the Central and Central Highlands regions: The water levels of the rivers changed slowly, and the downstream water levels fluctuated according to reservoir regulation and tide.
Rivers in the Southern region: The water levels at the headwaters of the Mekong River fluctuated according to the tide. By July 16, the highest daily water level at Tan Chau was at 1.4m, and at Chau Doc was at 1.6m.
