According to the National Center for Hydro-Meteorological Forecasting, at 1:00 p.m. on September 27, the center of the storm was at about 15.0 degrees north latitude; 114.0 degrees east longitude, about 270 km east-southeast of Hoang Sa Special Zone. The strongest wind near the storm center is level 11-12 (103-133 km/h), gusting to level 15. The storm is moving west-northwest at a speed of 30-35 km/h.
This is a storm that moves very quickly (nearly double the average speed), is strong, and has a wide range of impact. Storms can cause the combined effects of many types of natural disasters such as strong winds, heavy rain, floods, flash floods, landslides and coastal flooding.
Storm moves quickly inland, intensity when reaching shore is quite strong
It is forecasted that in the next 24 hours, the storm will move west-northwest, at a speed of about 30 km/h and is likely to strengthen. At 1:00 p.m. on September 28, the center of the storm was at about 17.2 degrees north latitude; 108.3 degrees east longitude, in the waters of Quang Tri - Da Nang city, about 180 km east of Quang Tri. Strong wind level 12-13, gust level 16.
The danger zone is from latitude 13 to 20 degrees north; west of longitude 116.0 degrees east. Level 3 natural disaster risk for the northern and central East Sea (including Hoang Sa special zone); sea area from Ha Tinh to Quang Ngai.
It is forecasted that in the next 36 hours, the storm will move west-northwest, at a speed of 20-25 km/h. At 1:00 a.m. on September 29, the center of the storm was at about 18.3 degrees north latitude; 105.8 degrees east longitude, on the mainland of Nghe An - Quang Tri. Strong wind level 10-11, gust level 14.
The danger zone is 14.5 degrees north latitude north of the northern latitude; 110.5 degrees east of the western longitude. The natural disaster risk level is level 4 for the coastal mainland area from Nghe An to north of Quang Tri; level 3 for the western sea area of the northern East Sea (including Hoang Sa special zone), from Thanh Hoa to Quang Ngai (including Hon Ngu island, Con Co and Ly Son special zone) and the north of the Gulf of Tonkin (including Bach Long Vy, Van Don, Co To, Cat Hai special zone and Hon Dau island); the mainland area from Ninh Binh to Hue City.
It is forecasted that in the next 48 hours, the storm will continue to move west-northwest, at a speed of 20-25 km/h, weakening into a tropical depression, then a low pressure area. At 1:00 p.m. on September 29, the center of the low pressure was at about 19.5 degrees north latitude; 103.6 degrees east longitude, in the Upper Laos area. Wind power below level 6.
The danger zone is north of latitude 16 degrees north; west of longitude 108.0 degrees east. Level 3 natural disaster risk: from Thanh Hoa to Da Nang city (including Hon Ngu island, Con Co special zone) and the northern Gulf of Tonkin (including Bach Long Vy special zone, Van Don, Co To, Cat Hai and Hon Dau island); mainland area from Ninh Binh to Hue city.
Storms may bring a combination of natural disasters
At sea, the northern and central areas of the East Sea (including the Hoang Sa special zone) will have strong winds of level 8-9, the area near the storm's eye will have winds of level 10-13, gusts of level 16, waves 6-8 m high, the area near the storm's eye will have winds of 8-10 m, the sea will be very rough. From the evening of September 27, the sea area from Thanh Hoa to Quang Ngai (including Hon Ngu island, Con Co and Ly Son special areas) will gradually increase to level 6-7, gusting to level 8-9, waves 3-5 m high, rough seas; from early morning of September 28, the wind will increase to level 8-9, the area near the storm center will have level 10-13, gusting to level 16, waves 5-7 m high, rough seas. Excessive destructive power, extremely strong waves, and the ability to sink heavy ships.
From early morning on September 28, the northern area of the Gulf of Tonkin (including Bach Long Vy, Van Don, Co To, Cat Hai and Hon Dau island) will gradually increase to level 6-7, then increase to level 8-9, gust to level 11, waves 3-5 m high, very rough seas, extremely dangerous for ships and boats.
Storm surge in coastal areas and islands from Ninh Binh to Ha Tinh will have water rising from 0.5-1.5 m, especially from southern Thanh Hoa to northern Ha Tinh will be 1-1.1 m high. The risk of flooding dykes, coastal roads, riverside due to rising sea water and big waves in the evening and night of September 28.
Weather warnings at sea and coastal areas during storms are extremely dangerous and unsafe for any vehicles or works operating in dangerous areas such as tourist boats, passenger ships, transport ships, cages, aquaculture areas, dykes, embankments, coastal roads. Vehicles are likely to overturn or be destroyed; there is a risk of flooding due to strong winds, large waves and rising sea levels.
On land, from the afternoon of September 28, the wind from Thanh Hoa to north of Quang Tri will gradually increase to level 6-7, then increase to level 8-9, near the storm's eye level 10-12, gust level 14, which can cause very heavy damage. Coastal areas from Quang Ninh to Ninh Binh, from southern Quang Tri to Hue City, winds will gradually increase to level 6-7, gusting to level 8-9.
Heavy rain, from the evening of September 27 to September 30, the North and the area from Thanh Hoa to Quang Ngai are likely to experience a widespread heavy rain with a total common amount of 100-300 mm, locally over 450 mm; in the Northern Delta, southern Phu Tho and from Thanh Hoa to northern Quang Tri, it will be 200-400 mm, locally over 600 mm.
