According to Mr. Hoang Phuc Lam - Deputy Director of the National Center for Hydro-Meteorological Forecasting, from 4:00 p.m. on July 20 to 7:00 a.m. on July 21, storm No. 3 will decrease in intensity.
"The storm has decreased by 3 levels, from level 12 to level 9 due to moving on mainland China. The storm is preparing to hit the Gulf of Tonkin," said Mr. Lam.
Latest update from the National Center for Hydro-Meteorological Forecasting, at 7:00 a.m. on July 21, the center of storm No. 3 Wipha was at about 21.3 degrees north latitude; 109.9 degrees east longitude, in the area north of the Lusian Peninsula (China), about 220 km east of Quang Ninh - Hai Phong. The strongest wind near the storm center is level 9 (75-88 km/h), gusting to level 11. The storm is moving west-southwest at a speed of 15-20 km/h.
Storm No. 3 Wipha strengthens as it enters the Gulf of Tonkin
It is forecasted that in the next 24 hours, the storm will move west-southwest at a speed of 10-15 km/h and is likely to strengthen. At 7:00 a.m. on July 22, the center of the storm was at about 20.5 degrees north latitude; 107.4 degrees east longitude, in the northern Gulf of Tonkin. The strongest wind near the storm center is level 10-11, gusting to level 14.
The danger zone is identified as being north of 19 degrees north latitude; from the route 106 degrees east longitude to 112 degrees east longitude. Level 3 natural disaster risk for the northwestern sea area of the northern East Sea, the Gulf of Tonkin, coastal waters of provinces from Quang Ninh to Ninh Binh.
It is forecasted that in the next 48 hours, the storm will continue to move west-southwest at a speed of 10-15 km/h and gradually weaken into a tropical depression. At 7:00 a.m. on July 23, the center of the tropical depression was at about 20 degrees north latitude; 105 degrees east longitude, on the mainland of Thanh Hoa - Nghe An provinces. Strong wind level 6, gust level 8.
The danger zone is identified as the north of the 18-degree north latitude; the west of the 109.-degree east longitude. Level 3 natural disaster risk for the Gulf of Tonkin sea area, coastal waters of provinces from Quang Ninh to Nghe An.
It is forecasted that in the next 72 hours, the storm will move west-southwest at a speed of 10-15 km/h, continuing to gradually weaken into a low pressure area. At 7:00 a.m. on July 24, the center of the low pressure area was at about 19.4 degrees north latitude; 102.5 degrees east longitude, on the mainland of upper Laos. Wind power below level 6.
The dangerous area at sea is north of 18 degrees north latitude; west of 106.5 degrees east longitude. Level 3 natural disaster risk for the Gulf of Tonkin sea area, coastal waters and mainland provinces from Hai Phong to Nghe An.
The North, Thanh Hoa and Nghe An have places with rainfall of over 600 mm
Regarding the impact of the storm at sea, the northwestern sea area of the northern East Sea will have strong winds of level 7-8, gusting to level 10. Waves are 3-5 m high, rough seas. The northern sea area of the Gulf of Tonkin (including the areas of Bach Long Vi, Co To, Van Don, Cat Hai, Hon Dau island) will have strong winds of level 6-7, then increase to level 8-9, the area near the storm center will have level 10-11, gusting to level 14. Waves 2-4 m high, near the center of the storm 3-5 m, the sea is rough.
The southern Gulf of Tonkin (including Hon Ngu Island) has winds gradually increasing to level 6-7, near the storm center level 8-9, gusting to level 11. Waves are 2-4 m high, the sea is very rough.
Regarding storm surge, coastal areas from Hung Yen to Quang Ninh have storm surge water from 0.5-1.0 m. The water level in Hon Dau (Hai Phong) is 3.7-4.1 m high, at Cua Ong (Quang Ninh) is 4.4-4.8 m high and at Tra Co (Quang Ninh) is 3.6-4.0 m high. There is a high risk of flooding in coastal areas and river mouths on the afternoon of July 22.
The meteorological agency warns that the weather at sea and in coastal mainland areas during the storm is extremely dangerous, unsafe for any vehicles or works operating in the dangerous area such as tourist boats, passenger ships, transport ships, cages, aquaculture areas, dykes, embankments, coastal roads. Vehicles are likely to overturn, be destroyed, or be flooded due to strong winds, thunderstorms, whirlwinds, large waves, and rising sea levels.
On land, from the evening and night of July 21, coastal areas from Quang Ninh to Nghe An will have winds gradually increasing to level 7-9, near the storm center level 10-11, gusting to level 14. The deep inland area has strong winds of level 6, gusting to level 7-8. Winds of level 10-11 can cause trees, electric poles to fall, and roofs to fall, causing very heavy damage.
Regarding heavy rain, from July 21 to July 23, in the northeastern region, the Northern Delta, Thanh Hoa and Nghe An, there will be heavy to very heavy rain and thunderstorms with common rainfall of 200-350 mm, locally over 600 mm.
Other places in the northern region and Ha Tinh will have moderate rain, heavy rain, locally very heavy rain and thunderstorms with common rainfall of 100-200 mm, locally over 300 mm.
Warning of the risk of heavy rain over 150 mm in 3 hours. Heavy rainfall in a short period of time can cause flash floods, landslides in mountainous areas, and flooding in low-lying areas.
