Latest update from the National Center for Hydro-Meteorological Forecasting, at 4:00 p.m. on September 24, the center of storm No. 9 Ragasa was at about 21.6 degrees north latitude; 112.1 degrees east longitude, about 450 km east of Mong Cai (Quang Ninh). The strongest wind near the storm center is level 13 (134-149 km/h), gusting to level 16. The storm is moving west-northwest at a speed of about 20 km/h.
It is forecasted that in the next 12 hours, the storm will move westward at a speed of about 20 km/h and gradually weaken.
At 4:00 a.m. on September 25, the storm center was at about 21.6 degrees north latitude; 109.6 degrees east longitude, about 180 km east of Mong Cai, with a strong intensity of level 10, gusting to level 12. The northern danger zone is 19.5 degrees north latitude, the west of the longitude is 114 degrees east longitude, level 3 natural disaster risk for the northwestern sea area of the northern East Sea and the northern Gulf of Tonkin.
It is forecasted that in the next 24 hours, the storm will weaken into a tropical depression. At 4:00 p.m. on September 25, the center of the tropical depression was at about 21.5 degrees north latitude; 107.2 degrees east longitude, on the mainland of Quang Ninh province. The intensity of the tropical depression is strong at level 7, gusting to level 9.
The dangerous area north of the latitude of 20 degrees north latitude, west of the longitude of 112 degrees east longitude, level 3 natural disaster risk for the northern area of the Gulf of Tonkin and the northeastern coastal areas.
It is forecasted that in the next 36 hours, the tropical depression will continue to weaken into a low pressure area. At 4:00 a.m. on September 26, the center of the low pressure area was at about 21.4 degrees north latitude; 104.7 degrees east longitude, in the Northwest mainland of the North, with an intensity below level 6.
Regarding the impact of the storm at sea, the northwestern sea area of the northern East Sea will have strong winds of level 8-11, the area near the center of the storm will have winds of level 12-13, gusts of level 16, waves 7-9 m high, and rough seas.
The eastern sea area of the northern Gulf of Tonkin (including Bach Long Vi) has strong winds of level 6-7, gusting to level 9. From the night of September 24, the northern area of the Gulf of Tonkin (including Bach Long Vi, Van Don, Co To, Cat Hai and Hon Dau) will gradually increase to level 7-8, waves 2-4 m high, near the storm center level 9-10, gusts of level 12, waves 3-4 m high, very rough seas.
The coastal area of Quang Ninh has storm surge of 0.3-0.5 m, boats anchored along the coast and aquaculture areas are strongly affected by winds, big waves and rising sea levels.
On land, from early morning on September 25, coastal areas from Quang Ninh to Hung Yen will have winds gradually increasing to level 6-7, near the storm center level 8-9, gusting to level 11. The deep inland area northeast of the Ministry has strong winds of level 5, some places level 6, gusting to level 7-8.
Regarding the flood situation, from the night of September 24 to the end of the night of September 26, the North, Thanh Hoa and Nghe An will have heavy to very heavy rain with common rainfall of 150-300 mm, some places over 450 mm, risking urban flooding.
From September 25 to September 27, there is a possibility of a flood on rivers in the Northern region, Thanh Hoa, Nghe An. Flood peaks on Thao River and small rivers are likely to reach alert level 2-3; on Lo River, upstream of Thai Binh River, Hoang Long River, Buoi River, upstream of Ma River will reach alert level 1-2, some places above alert level 2.
There is a high risk of flooding in low-lying areas, flash floods on small rivers and streams and landslides on steep slopes.
Due to the influence of a wide storm circulation, it is necessary to be on guard against the risk of thunderstorms, tornadoes and strong gusts of wind both before and during the storm's landfall.
