Storm surge and coastal flooding warning

(Chinhphu.vn) – In the past 3 hours, storm No. 5 has barely moved, its intensity has decreased to level 12, gusting to level 14. It is forecasted that in the next 3-6 hours, storm No. 5 will move in a West-Northwest direction, entering the mainland of the North Ha Tinh-South Nghe An area. There is a high risk of flooding on dikes, coastal roads, and river mouths, especially along the coast of Nghe An and Thanh Hoa in the afternoon and evening of August 25.

Image of storm No. 5 at 6:00 p.m. on August 25

At 6:00 p.m., the center of the storm was at about 18.4 degrees North latitude; 105.8 degrees East longitude, on the mainland of Nghe An - Ha Tinh area. Strongest wind speed: Level 11 (103-117km/h), gusting to level 13. In the next 3 hours, the storm will move in the West Northwest direction, at a speed of about 10-15km/h.

In the past 3 hours, storm No. 5 has barely moved, its intensity has decreased to level 12, gusting to level 14. It is forecasted that in the next 3-6 hours, storm No. 5 will move in a West-Northwest direction, making landfall in the North Ha Tinh-South Nghe An region. The risk of strong winds from storm No. 5 is still present.

Due to the influence of storm No. 5, at Bach Long Vi station (Hai Phong), there are strong winds of level 7, gusting to level 9; Co To station (Quang Ninh) has strong winds of level 7, gusting to level 10; Bai Chay station (Quang Ninh) has strong winds of level 6, gusting to level 8; Van Ly station (Ninh Binh) has strong winds of level 8, gusting to level 9; Dien Chau station (Nghe An) has strong winds of level 9, gusting to level 11; Quynh Luu station (Nghe An) has strong winds of level 7, gusting to level 10; Hon Ngu station (Nghe An) has strong winds of level 8, gusting to level 11; Hoanh Son station (Ha Tinh) has strong winds of level 7, gusting to level 9; Ky Anh station (Ha Tinh) has strong winds of level 8, gusting to level 11; Cam Nhuong station (Ha Tinh) has strong winds of level 9, gusting to level 12; Con Co station (Quang Tri) has strong winds of level 6, gusting to level 8...

Storm surge in Sam Son (Thanh Hoa) 1.01m, Hon Ngu (Nghe An) 1.66m, Vung Ang (Ha Tinh) 0.51m. In the Northern Delta provinces, from Thanh Hoa to Quang Tri, there has been moderate to heavy rain, in some places very heavy rain over 500mm.

At sea: The sea area from Thanh Hoa to Quang Tri (including Hon Ngu island, Con Co special zone) has strong winds of level 8-10, near the storm center level 11-12, gusting to level 14; waves 4.0-6.0m high, near the storm center 7.0-9.0m; rough seas. The northern Gulf of Tonkin (including the special zones: Cat Hai, Co To, Van Don) has strong winds of level 6-7, gusting to level 9; the southern area of ​​the northern Gulf of Tonkin (including the Bach Long Vi special zone) has strong winds of level 7-8, gusting to level 10; waves 3.0-5.0m high; rough seas.

On the coast and islands from Hai Phong to Nghe An, sea levels continue to rise due to high tides and storm surges. Storm surges remain high at 0.5-1.0m.

Water level at Hon Dau (Hai Phong) is 3.4-3.9m high, Ba Lat ( Ninh Binh ) is 1.7-2.2m, Sam Son (Thanh Hoa) is 3.7-4.2m, at Hon Ngu (Nghe An) is 3.8-4.0m. There is a high risk of flooding of dikes, coastal roads, river mouths, especially along the coast of Nghe An and Thanh Hoa in the afternoon and evening of August 25.

The weather at sea and in coastal areas during storms is extremely dangerous and unsafe for any vehicles or structures operating in the danger zone such as: cruise ships, passenger ships, cargo ships, cages, rafts, aquaculture areas, dykes, embankments, coastal routes. Vehicles are at high risk of capsizing, destruction, and flooding due to strong winds, large waves, and rising sea levels.

On land, in the North Thanh Hoa area, there will be strong winds of level 7-8, gusting to level 9-10; in the South Thanh Hoa-North Ha Tinh area, there will be strong winds of level 9-10, near the storm center, level 11-12, gusting to level 13-14; in the South Ha Tinh, Quang Tri areas, coastal areas of the provinces from Quang Ninh to Ninh Binh, there will be strong winds of level 6-8, gusting to level 9-10. From the evening of August 25 to the end of August 26, in the midlands and deltas of the North, Lao Cai, Son La and from Thanh Hoa to Quang Tri, there will be widespread heavy rain with common rainfall of 70-150mm, locally over 250mm; in the Thanh Hoa to North Quang Tri area, there will be heavy to very heavy rain with common rainfall of 150-350mm, locally over 500mm. Warning of the risk of heavy rain (>200mm/3h).

From the evening of August 25-26, Hanoi capital will have moderate rain, heavy rain and thunderstorms; Da Nang city will have occasional showers; Ho Chi Minh city will have rain, showers and thunderstorms (thunderstorms concentrated in the afternoon and evening). During thunderstorms, be on guard against the risk of tornadoes and strong gusts of wind.

From the evening of August 25-27, the Upper and Central Laos regions had heavy rain with common rainfall of 100-250mm, especially in the Central Laos region, some places had over 500mm.

Thu Cuc

Source: https://baochinhphu.vn/canh-bao-nuoc-dang-do-bao-va-ngap-lut-khu-vuc-ven-bien-102250825181206806.htm