Storm No. 13: Wind and heavy rain are different from Damrey and Molave

Photo caption — Floodwaters in Hoi An ancient town, Da Nang city. Photo: VNA

According to the National Center for Hydro-Meteorological Forecasting, storm No. 13 is a strong, fast-moving storm with a wide circulation, operating on the tropical convergence zone, with high sea surface temperatures, a humid atmosphere, and a weakening cold front. Therefore, the storm will intensify after entering the East Sea. After that, the storm will move towards the Vietnamese mainland, focusing on the provinces and cities from Da Nang to Dak Lak .

Comparing the similarities and differences between storm No. 13 and other storms, Director of the National Center for Hydro-Meteorological Forecasting Mai Van Khiem said: The similarity between storm No. 13 and storm No. 12 - (Damrey) in 2017 and storm No. 9 (Molave) in 2020 is that the direction of movement and impact of storm No. 13 are similar to storm No. 12 - (Damrey) in 2017 and storm No. 9 (Molave) in 2020. Along with that, all three storms above caused heavy rain in the Central region.

However, through observation and analysis of storm data, the difference between the above storms is the wind strength of the storm and the impact of causing rain when making landfall.

According to the forecast at 5:00 p.m. on November 5, storm No. 13 is forecast to have strong winds of level 10, gusts of level 12 when it makes landfall in the provinces of Quang Ngai-Gia Lai. Meanwhile, storm No. 9 (Molave) when it makes landfall in the area of Quang Ngai-Da Nang will have strong winds of level 11-12, gusts of level 14 (stronger than storm No. 13). Meanwhile, storm No. 12 - (Damrey) when it makes landfall in the areas of Phu Yen and Khanh Hoa provinces will have strong winds of level 9, lower in intensity than storm No. 13 and storm No. 9 - Molave.

Regarding the impact of the storm, storm No. 13 is forecast to cause very heavy rain in the area from Da Nang to Dak Lak with common rainfall of 200-400mm/period, locally over 600mm/period; the area from South Quang Tri to Hue city, Khanh Hoa and Lam Dong will have heavy rain with common rainfall of 150-300mm/period, locally over 450mm/period from November 6-7.

With this forecast, storm No. 13 will cause localized rain heavier than storm No. 12 - (Damrey) and storm No. 9 - (Molave). Specifically, storm No. 12 - (Damrey) will cause heavy rain in the Hue - Khanh Hoa area from 150 - 250mm, higher in some places such as Son Giang (Quang Ngai) 382mm; storm No. 9 - (Molave) will cause heavy rain from 150 - 400mm in many places from Nghe An to Dak Lak, some stations measured rainfall over 550mm.

In addition, storm No. 13 is forecasted not to cause large floods like the circulation of storm No. 12 in 2025. The total rainfall from October 22 to 4:00 a.m. on October 29 due to the influence of storm No. 12 in Ha Tinh, Quang Tri and Quang Ngai is generally 200-450mm; Hue city from 450-900mm; Da Nang city 300-600mm. In particular, there are places with very heavy rain such as Bach Ma with 1739.6mm of rain in 1 day, this is the largest rainfall in 1 day ever in Vietnam. In particular, by noon on October 29, the water level on the Vu Gia, Thu Bon and Tam Ky river systems exceeded many alarm levels, in some places exceeding the historical flood level of 1964.

Source: https://baotintuc.vn/xa-hoi/bao-so-13-suc-gio-mua-lon-khac-biet-voi-damrey-va-molave-20251105191705991.htm