Image of storm No. 5 at 12:00 on August 25
According to information at 12 noon on August 25, the National Center for Hydro-Meteorological Forecasting said that the center of the storm was located at about 18.5 degrees North latitude; 106.5 degrees East longitude, about 85km East Southeast of Nghe An, about 65km East of Ha Tinh , about 135km East Northeast of Bac Quang Tri. Strongest wind: Level 13 (134-149km/h), gusting to level 16.
Forecast: In the next 3 hours, the storm will move in the West Northwest direction, at a speed of about 15km/h.
From now until the afternoon, when the storm moves into the Ha Tinh-Thanh Hoa sea area, the storm will maintain its intensity at level 14, gusting at level 15-16. When approaching the coast of Ha Tinh- Nghe An, the intensity may decrease to late level 13, early level 14.
On land, in the North of Thanh Hoa, there will be strong winds of level 8-9, gusting to level 10-11; in the South of Thanh Hoa - North of Ha Tinh, there will be strong winds of level 10-11, near the storm center, level 12-14, gusting to level 15-16 (Radius of strong winds above level 12 around the storm center is about 50km); in the South of Ha Tinh, Quang Tri, coastal areas of provinces from Quang Ninh to Ninh Binh, there will be strong winds of level 6-8, gusting to level 9-10.
Deep inland in the South Thanh Hoa - Ha Tinh area, about 50-70km from the coast, strong winds level 8-9, gusts level 11-12; further inland, the part bordering Laos, strong winds level 6-7, gusts level 7-8.
Strong wind time: Strong winds on land in the provinces from Thanh Hoa to Quang Tri began to appear from the morning of August 25. The strongest wind time is from 12 noon to about 6 pm.
From the morning of August 25 to the end of August 26, in the midlands and deltas of the North, Lao Cai area and from Thanh Hoa to Hue city, there will be widespread heavy rain with common rainfall of 100-150mm, locally over 250mm; in particular, the area from Thanh Hoa to Northern Quang Tri will have heavy to very heavy rain with common rainfall of 200-400mm, locally over 600mm. Warning of the risk of heavy rain (>200mm/3 hours).
Storm No. 5 is still strong as it approaches land
Meteorological experts said that the forecasts for the intensity of storm No. 5 are still strong when approaching land. Firstly, storm No. 5 moves over the central sea with water surface temperatures of up to 30°C; at the same time, it is energized by the southwest monsoon from the Bay of Bengal and the east wind of the subtropical high pressure tongue, so the possibility of the storm maintaining its strong intensity is very high.
Second, the vertical wind shear of this storm is small at 2.5m/s in the southern Gulf of Tonkin, which is favorable for the storm to maintain its intensity when approaching the shore.
Third, the circulation of storm No. 5 is less affected by friction with the terrain of Hainan Island, so its structure is not broken.
Forecasts from weather models calculated by Vietnam and internationally all predict that the storm will continue to maintain its strong intensity as it approaches the shore.
When moving close to the shore, friction increases, the influence of the northwestern part of the subtropical high pressure tongue (the shape that determines the path of storm No. 5) will make the storm less symmetrical, the axis tilts more to the north, so it will reduce its intensity.
According to experts, the intensity forecast when making landfall has a high consensus among international forecasting agencies such as: Japan and Beijing (China) are both level 13-14; Hong Kong (China) level 14.
Thu Cuc
Source: https://baochinhphu.vn/bao-so-5-tang-cuong-do-khi-do-bo-vao-dat-lien-mua-lon-tren-dien-rong-102250825122014506.htm
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