Updated from the National Center for Hydro-Meteorological Forecasting, at 10:00 on October 4, the center of storm No. 11 Matmo was at about 18.2 degrees north latitude; 116 degrees east longitude, in the northern East Sea, about 570 km east-southeast of Hainan Island (China). The strongest wind near the storm center is level 11 (103-117 km/h), gusting to level 14. The storm is moving west-northwest at a speed of about 25 km/h.
Storm No. 11 with the strongest gusts of level 16, then weakens rapidly
It is forecasted that in the next 24 hours, the storm will move west-northwest, at a speed of 20-25 km/h and is likely to strengthen.
At 10:00 on October 5, the center of the storm was at about 20.3 degrees north latitude; 110.8 degrees east longitude, in the sea east of Zhou Peninsula (China). Strong wind level 13, gust level 16.
The danger zone is north of latitude 16.5 degrees north; east of longitude 109.5 degrees east. The natural disaster risk level is level 3 for the northern East Sea area.
The meteorological agency said that storm No. 11 will weaken rapidly when passing through the Lusian Peninsula and mainland China.
It is forecasted that in the next 48 hours, the storm will continue to move west-northwest, at a speed of about 20 km/h and gradually weaken. At 10:00 on October 6, the center of the storm was at about 21.8 degrees north latitude; 107 degrees east longitude, in the Vietnam - China border area. Strong wind level 8, gust level 10.
The danger zone is north of latitude 18 degrees north; east of longitude 113 degrees east. The natural disaster risk level is level 3 for the northwestern area of the northern East Sea, the northern sea area of the Gulf of Tonkin and the coastal mainland from Quang Ninh to Hung Yen.
It is forecasted that in the next 60 hours, the storm will move west-northwest at a speed of 15-20 km/h, moving deep into the mainland and weakening. At 10:00 p.m. on October 6, the center of the storm was at about 22.8 degrees north latitude; 104.8 degrees east longitude, in the northern mountainous areas of the North. Wind intensity below level 6.
The mountainous and midland areas of the North are the focus of heavy rain
Regarding the impact of the storm at sea, the northern East Sea area has strong winds of level 8-10, the area near the storm's eye has level 11-13, gusts of level6; waves 4-6 m high, the area near the storm's eye has 6-8 m, the sea is very rough.
From the afternoon of October 5, the northeastern sea area of the Gulf of Tonkin (including the Bach Long Vi special zone) will have winds gradually increasing to level 6-7, then increasing to level 8-9. From the evening of October 5, the northern area of the Gulf of Tonkin (including the special areas of Bach Long Vi, Van Don, Co To, Cat Hai and Hon Dau island) will gradually increase to level 8-9, waves 2-4 m high; the area near the storm's eye will have level 10-11, gusts of level 14, waves 3-5 m high, and rough seas.
Coastal areas and islands in Quang Ninh - Hai Phong will have storm surges of 0.4-0.6 m high, with the risk of flooding in low-lying coastal areas and river mouths from the afternoon and evening of October 5.
The weather at sea and coastal areas during the storm is extremely dangerous, unsafe for any vehicle or construction operating in the danger zone. Ships, aquaculture cages, dykes and coastal roads are at high risk of being damaged, capsized, or destroyed; flooded due to strong winds, large waves and rising water.
On land, from the night of October 5, coastal areas from Quang Ninh to Hung Yen will have winds gradually increasing to level 6-7, near the storm's eye level 8-9. The deep inland area east of the Northeast will have strong winds of level 4-5, some places will have level 6, gusting to level 7-8.
Regarding heavy rain, from the night of October 5 to the end of the night of October 7, the mountainous and midland areas of the North will have heavy rain with a common amount of 150-250 mm, locally over 400 mm. Warning of the risk of heavy rain with rainfall greater than 150 mm within 3 hours. The Northern Delta and Thanh Hoa have moderate rain, heavy rain 70-150 mm, locally over 200 mm.
The meteorological agency said that as of noon on October 4, the rain forecast from 7:00 p.m. on October 5 to 7:00 p.m. on October 6 was concentrated in the Northeast, especially Quang Ninh, Cao Bang, Lang Son, Thai Nguyen, northern Tuyen Quang and Lao Cai. From 7:00 p.m. on October 6 to 7:00 p.m. on October 7, the center of the rain will narrow and move quickly to the west.
The Hanoi area is less likely to be affected by storms and winds, and it is forecasted that from early morning on October 6 to the end of October 7, there will be moderate rain, heavy rain of 70-120 mm, locally over 150 mm.
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.
A representative of the meteorological agency said that the rainfall due to storm No. 11 may be slightly lower than storm No. 10. However, in the context of prolonged heavy rain in the same area of the North, the risk of flash floods, landslides, and flash floods is very high, especially in the midlands and mountainous areas of the North.
*The meteorological agency noted above is the updated forecast until noon on October 4. The information forecast for the impact of the storm may change according to the actual path and developments of storm No. 11 Matmo and will be continuously updated.
