According to the National Center for Hydro-Meteorological Forecasting, through monitoring on satellite images, lightning positioning data and weather radar images, convective clouds are developing in some wards and communes in the southwestern area of Hanoi: Tran Phu, Xuan Mai, Phu Nghia, Chuong My, Quang Bi, Hong Son.This cloud area continues to expand to the east and northeast.
In the next 15 minutes to 4 hours (from 10:15 on September 9), wards in Hanoi's inner city such as: Chuong My, Yen Nghia, Kien Hung, Duong Noi, Ha Dong...will have rain, showers and thunderstorms.After that, the thunderstorm area may expand to other wards in the center of Hanoi city.During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.The warning level of natural disaster risk due to tornadoes, lightning, and hail is level 1.
According to the National Center for Hydro-Meteorological Forecasting, in the past 8 hours (from 0:00 to 8:00 on September 9), the northern mountainous provinces have had moderate rain, heavy rain, and very heavy rain monitoring stations such as: Lang Mo 104.8mm (Lai Chau); Song Da 83mm (Dien Bien); Nam Pham 62.2mm (Son La); Tan Tien 101.6mm (Lao Cai); Thanh Tin 115.8mm (Tuyen Quang); Cong Bang 132mm (Thai Nguyen); An Lai 119.6mm (Cao Bang); Tan Minh 97mm (Lang Son); Chuc Bai Son 108.6mm (Quang Ninh)... The soil moisture model shows that some areas in the above provinces are nearly saturated (over 85%) or have reached the same state.
Warning in the next 3 - 6 hours (from 8:30 a.m. on September 9), the above provinces will continue to have rain with common accumulated rainfall in Dien Bien, Lai Chau, Son La, Lao Cai and Tuyen Quang from 30 - 70mm, some places over 150mm; Quang Ninh, Lang Son, Cao Bang and Thai Nguyen from 20 - 50mm, some places over 90mm.
Warning in the next 6 hours (from 8:30 a.m. on September 9), there is a risk of flash floods on small rivers and streams, landslides on steep slopes in many communes/wards.
