Day and night of July 18, the Central Highlands and Southern regions had moderate rain, heavy rain and thunderstorms with common rainfall ranging from 30-70mm, locally over 100mm.
The Northern and North Central regions have scattered showers and thunderstorms with rainfall ranging from 15-30mm, locally over 70mm. Particularly in the coastal areas, the Southern Delta, Thanh Hoa and Nghe An, on the morning of July 18, there was moderate rain and scattered thunderstorms with rainfall from 20-30mm, locally over 60mm.
The Central and South Central regions have scattered showers and thunderstorms, locally with heavy rain with rainfall of 15-30mm, locally with over 70mm.
Day and night of July 18, in the sea area from Khanh Hoa - Binh Thuan, there was a strong southwest wind of level 6, with gusts of level 7-8; Sea waves are 2.0-3.0m high; The sea area from Ba Ria - Vung Tau to Ca Mau, the Gulf of Thailand, the southwestern sea area of the middle of the East Sea, the western sea area of the southern East Sea region (including the western sea area of the Truong Sa archipelago) There is a strong southwest wind level 5, sometimes level 6, gusts level 7-8; Sea waves are 1.5-3.0m high. During thunderstorms, there is a possibility of tornadoes and strong winds of level 7-8.
Regarding the rain situation, from 7:00 p.m. on July 16 to 7:00 p.m. on July 17, areas across the country have moderate to heavy rain, common rainfall is from 50-70mm, some stations have heavier rainfall such as: Lieu De (South Dinh) 157mm; Ninh Binh (Ninh Binh) 127mm; Ba Khan (Hoa Binh) 122mm; Thanh Hoa (Thanh Hoa) 81mm; Hon Ngu (Nghe An) 101mm; Son Lam (Ha Tinh) 119mm; Ho Ho hydroelectric reservoir (Quang Binh) 106mm; Rao Trang 4 Hydropower Plant (Thua Thien Hue) 136mm; Bao Loc Pass (Lam Dong) 84mm; Tho Chu (Kien Giang) 81mm.
Night rain from 7:00 p.m. on July 17 to 7:00 a.m. on July 18, the Northern Delta and North Central regions have moderate rain, heavy to very heavy rain, common rainfall is from 40-60mm, some stations have heavier rainfall such as: Ba Sao (Ha Nam) 84mm; Lieu De (Nam Dinh) 157mm; Dong Son (Nam Dinh) 145mm; Trung An (Thai Binh) 105mm; Dong Giao (Ninh Binh) 85mm; Vinh Thinh (Thanh Hoa) 99mm; Moc Son (Nghe An) 81mm.
Regarding the hydrological situation, the water level of the rivers in the Northern region at 7:00 a.m. on July 18 on the Red River at Hanoi station was 4.84m; on Thai Binh river at Pha Lai station is 1.50m.
It is forecasted that the water level downstream of the Red River will rise after a slow change, by 7:00 a.m. on July 19 at Hanoi station it will likely be at 5.35m; In the next 36 hours, the highest water level at Pha Lai is likely to be at 1.70m and the lowest at 1.30m.
Rivers in the Central and Central Highlands regions, water levels on the Ma, Ca, and La rivers are falling; Other rivers change slowly, the water level downstream of the rivers fluctuates according to reservoir regulation and tides.
In the Southern rivers, the water level in the Mekong River's upstream fluctuates with the tide. By July 21, the highest daily water level in Tan Chau was 1.55m, in Chau Doc was 1.75m.
