Storm No. 11 has entered the Northern Gulf of Tonkin, with very heavy rain in some places, over 400mm.

Many places in the North have heavy rain over 400mm. Illustrative photo

At 7:00 p.m., the center of the storm was at about 21.2 degrees North latitude; 109.5 degrees East longitude, about 190km East Southeast of Mong Cai ( Quang Ninh ). The strongest wind near the center of the storm was level 11-12 (103-133km/h), gusting to level 15; moving in the West Northwest direction, speed about 20km/h.

It is forecasted that by 7am on October 6, the storm will move into the mainland of Guangxi province (China), with strong winds of level 8, gusting to level 10. The storm will move in the West-Northwest direction at a speed of about 20 km/h. The affected areas are the Northwestern sea area of the North East Sea, the North Gulf of Tonkin and the coastal mainland area from Quang Ninh to Hung Yen, including Lang Son province, the Northeast of Bac Ninh province and the East of Cao Bang province.

The movement of storm No. 11 at 8:00 p.m. on October 5. Photo: VNA

By 7 p.m. on October 6, the storm moved into the northern mountainous region and weakened into a low-pressure area with winds down to level 6. The storm continued to move in a West-Northwest direction at a speed of about 20 km/h. The affected areas are the northern Gulf of Tonkin and the coastal mainland from Quang Ninh to Hung Yen, including Lang Son province, the northeast of Bac Ninh province and the east of Cao Bang province. Disaster risk level: level 3.

Due to the storm's influence, the Northwestern sea area of the North East Sea has strong winds of level 8-9, gusts of level 11, waves 4-6m high, very rough seas (very dangerous for ships). The Northern Gulf of Tonkin area (including Bach Long Vy, Van Don, Co To, Cat Hai and Hon Dau island) has strong winds of level 7-9, near the storm's eye level 10-12, gusts of level 15, waves 2.0-4.0m high, near the storm's eye 3.0-5.0m, rough seas (very dangerous for ships). The coastal areas and islands of Quang Ninh - Hai Phong provinces have storm surges of 0.4-0.6m high.

Beware of flooding in low-lying coastal areas and river mouths due to rising water and high waves tonight and early tomorrow morning. Weather warnings at sea and inland coastal areas during the storm are extremely dangerous and unsafe for any vehicles or structures operating in the danger zone such as: cruise ships, passenger ships, transport ships, cages, rafts, aquaculture areas, dykes, embankments, coastal routes. Vehicles are at high risk of capsize and destruction; flooding due to strong winds, high waves and rising sea levels.

On land, from the night of October 5 to noon of October 6, on land in coastal areas from Quang Ninh to Hung Yen and Lang Son province, winds will gradually increase to level 6-7, near the storm center level 8-9, gusting to level 11-12 (winds can break tree branches, blow off roofs causing damage to houses, it is impossible to go against the wind).

The inland areas of the Northeast have strong winds of level 4-5, in some places level 6, gusting to level 7-8. The communes/wards in the Northeast of Quang Ninh province are likely to have strong winds of level 8-9, gusting to level 11-12; the remaining communes/wards of Quang Ninh province and the coastal areas of Hai Phong are likely to have strong winds of level 7-8, gusting to level 10; the coastal communes/wards of Hung Yen province and the communes in the northern border areas of Lang Son province are likely to have strong winds of level 6-7, gusting to level 9; the Northeast of Bac Ninh province (formerly Bac Giang province) and the Eastern area of Cao Bang province are likely to have strong winds of level 6, gusting to level 8.

In addition, from the night of October 5 to the end of the night of October 7, in the mountainous and midland areas of the North, there will be heavy rain, with rainfall ranging from 150-250mm, and locally very heavy rain over 400mm. Warning of the risk of heavy rain (over 150mm/3 hours); in the Northern Delta and Thanh Hoa, there will be moderate to heavy rain with rainfall ranging from 70-150mm, and locally very heavy rain over 200mm. The Hanoi area is unlikely to be affected by storms, and it is necessary to be on guard against thunderstorms, tornadoes, and strong gusts of wind.

It is forecasted that from early morning on October 6 to the end of October 7, there will be moderate to heavy rain, with general rainfall of 70-120mm, locally over 150mm. Due to the influence of the wide storm circulation, it is necessary to guard against the risk of thunderstorms, whirlwinds and strong gusts of wind both before and during the storm's landfall.

According to VNA

Source: https://www.sggp.org.vn/bao-so-11-da-di-vao-bac-vinh-bac-bo-co-noi-mua-rat-to-tren-400mm-post816499.html