According to the National Center for Hydro-Meteorological Forecasting, through monitoring on satellite images, lightning positioning data and weather radar images, it shows that convective clouds are developing in the areas of communes/wards such as Bat Trang, Nam Phu, Hong Van, Chuong My. This cloud area tends to expand towards the inner city of Hanoi.
In the next 3 hours (from 1:45 p.m. on September 15), Long Bien, Linh Nam, Yen So, Hoang Mai, Vinh Hung, Vinh Tuy, Tuong Mai, Hoang Liet, Yen Nghia wards... will have showers and thunderstorms. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
The Northwest region during the day and night of September 15 is forecast to have scattered showers and thunderstorms with rainfall of 10-30mm, locally heavy rain over 70mm.
In the area from Thua Thien Hue to Lam Dong and the South in the afternoon and night of September 15, there will be scattered showers and thunderstorms, locally heavy rain with rainfall of 15 - 30mm, locally over 80mm.
Warning of the risk of heavy rain over 70mm within 3 hours. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind. Localized heavy rains are likely to cause flash floods on small rivers and streams, landslides on steep slopes and flooding in low-lying areas.