Storm No. 11 (Matmo), level 15 gusts, in the northern East Sea area

According to the National Center for Hydro-Meteorological Forecasting, at 7:00 p.m. on October 4, the center of the storm was located at about 18.7 degrees north latitude, 114.3 degrees east longitude, in the northern East Sea, about 380km east-southeast of Hainan Island (China).

Forecast map of storm No. 11's trajectory and intensity issued at 8:00 p.m. on October 4.

The strongest wind near the storm center is level 12 (118-133km/h), gusting to level 15. Moving west-northwest at a speed of about 25km/h.

Storm forecast for the next 24 to 48 hours:

Forecast time	Direction, speed	Location	Intensity	Danger zone	Disaster Risk Level (Affected Area)
7 hours October 5	West northwest, 20-25km/h	19.8N-111.9E; on the northwest sea of ​​the northern East Sea; about 500km east-southeast of Quang Ninh	Strong level 12-13, jerk level 16	North of latitude 17.0 0 N; longitude 110.0 0 E-116.5 0 E	Level 3: Northwest sea area of ​​the northern East Sea, eastern sea area of ​​the northern Gulf of Tonkin
19 hours October 5	West northwest, 20-25km/h	20.9N-109.4E; on the eastern sea of ​​the northern Gulf of Tonkin; about 190km southeast of Quang Ninh	Reduce to level 11-12, jerk level 15	North of latitude 17.5 0 N; longitude 108.0 0 E-113.5 0 E	Level 3: Northwest sea area of ​​the northern East Sea, northern Gulf of Tonkin
7 hours October 6	West northwest, about 20km/h	21.8N-107.5E; in the area between Quang Ninh province (Vietnam) and Guangxi province (China)	Reduce to level 8-9, jerk level 12	North of latitude 19.0 0 N; west of longitude 112.0 0 E	Level 3: Northern sea area of ​​the Gulf of Tonkin, coastal mainland area from Quang Ninh to Hung Yen
19 hours October 6	West northwest, about 20km/h	22.3N-105.6E; in the northern mountainous area of ​​the North	Weakens into a low pressure area (Level <6)

Strong winds, big waves, rising water

At sea, in the northern East Sea, there are strong winds of level 8-10, near the storm center level 11-13, gusts of level 15-16, waves 4-6m high, near the storm center 6-8, rough seas (extremely destructive, extremely strong waves. Sinking large tonnage ships).

From the afternoon of October 5, the sea area east of the Northern Gulf of Tonkin (including Bach Long Vi special zone) has winds gradually increasing to level 6-7, then increasing to level 8-9. From the evening of October 5, the northern Gulf of Tonkin area (including Bach Long Vi special zone, Van Don, Co To, Cat Hai and Hon Dau island) has winds gradually increasing to level 8-9, waves 2-4m high, the area near the storm center has levels 10-11, gusts level 14, waves 3-5m high, rough seas ( very dangerous for ships).

Rising water and coastal flooding

Coastal areas and islands in Quang Ninh - Hai Phong provinces have storm surges of 0.4-0.6m. Beware of flooding in low-lying coastal areas and river mouths due to surges and big waves from the afternoon and evening of October 5.

Weather warning at sea, coastal mainland during the storm is extremely dangerous, unsafe for any vehicle or structure operating in the danger zone such as: cruise ships, passenger ships, transport ships, cages, rafts, aquaculture areas, dykes, embankments, coastal routes. Vehicles are highly likely to capsize, be destroyed; flooded due to strong winds, big waves and rising sea levels.

On land, from the night of October 5, on land in coastal areas from Quang Ninh to Hung Yen, winds will gradually increase to level 6-7, near the storm center, level 8-9, gusting to level 10-11 ( winds can break tree branches, blow roofs off houses, causing damage to houses. Cannot go against the wind ). Inland areas in the northeast of the country, winds will be strong at level 4-5, in some places level 6, gusting to level 7-8.

Heavy rain

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 average rainfall of 150-250mm, and locally very heavy rain over 400mm. Warning of the risk of heavy rain (>150mm/3 hours); in the Northern Delta and Thanh Hoa, there will be moderate to heavy rain with average rainfall of 70-150mm, and locally very heavy rain over 200mm.

Hanoi area: Less likely to be affected by storms. It is forecasted that from early morning on October 6 to the end of October 7, there will be moderate to heavy rain, with average rainfall of 70-120mm, and locally over 150mm.

Due to the influence of the wide storm circulation, it is necessary to guard against the risk of thunderstorms, tornadoes and strong gusts of wind both before and during the storm's landfall.

According to Nhan Dan Newspaper

Source: https://baotuyenquang.com.vn/xa-hoi/202510/bao-so-11-matmo-giat-cap-15-o-khu-vuc-bac-bien-dong-12a69f2/