According to the National Center for Hydro-Meteorological Forecasting, last night and this morning (September 21), the Northern region, the Central Highlands and the South had scattered showers and thunderstorms, with some places having heavy to very heavy rain. Rainfall from 7pm on August 20 to 8am on August 21 was over 100mm in some places such as: Nhat Hoa station (Lang Son) 123.6mm, Bac Quang station (Tuyen Quang) 113.6mm, Son Dong station (Bac Ninh) 243.6mm, Nha Be station (Ho Chi Minh City) 129mm...
The mountainous areas of the North from August 21 to the night of August 22 are forecast to have moderate rain, heavy rain and thunderstorms with common rainfall of 50 - 120mm, locally very heavy rain over 250mm.
The meteorological agency warns of the risk of heavy rain with rainfall greater than 100mm within 3 hours. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
From August 23, heavy rain in the mountainous areas of the North is forecast to gradually decrease
Other places in the North and Thanh Hoa during the day and night of August 21 are forecast to have scattered showers and thunderstorms with rainfall of 10 - 30mm, locally heavy rain over 70mm.
The area from Gia Lai to Lam Dong and the South during the day and night of August 21 is forecast to have rain, moderate rain and thunderstorms with rainfall of 20 - 40mm, locally heavy rain over 80mm.
The warning level of natural disaster risk due to tornadoes, lightning, and hail is level 1. Localized heavy rains are likely to cause flash floods on small rivers and streams, landslides on steep slopes and flooding in low-lying areas.
Regarding the sea weather, currently, the sea area from Gia Lai to Ca Mau, Ca Mau to An Giang and the Gulf of Thailand has scattered showers and thunderstorms.
Forecast for the day and night of August 21, the sea area west of the North of the Gulf of Tonkin, the central and southern East Sea (including the special sea area of Truong Sa); the sea area from Gia Lai to Ca Mau, from Ca Mau to An Giang and the Gulf of Thailand will have scattered showers and thunderstorms.
During thunderstorms, there is a possibility of tornadoes, strong gusts of wind of level 6 - 7 and waves 1 - 2m high. All ships operating in the above areas are at risk of being affected by tornadoes and strong gusts of wind.
