According to the National Center for Hydro-Meteorological Forecasting, through monitoring on satellite images and weather radar images in the past 3 hours, it shows that convective clouds are developing in the areas of Ba Vi, Kieu Phu, Phu Cat, Phu Nghia, Xuan Mai, Tran Phu, Hung Dao, Quoc Oai communes. Convective clouds tend to move towards the inner city of Hanoi.
Warning from 30 minutes to 3 hours (from 14:20 on August 20), it is likely that Chuong My, Yen Nghia, Duong Noi, Kien Hung, Tay Mo wards.... will have showers and thunderstorms. The thunderstorm area may expand to other wards in Hanoi's inner city. During the rain, there is a possibility of tornadoes, lightning and strong gusts of wind.
In the mountainous areas of the North during the day and night of August 20, it is forecasted to have rain, moderate rain and scattered thunderstorms, locally heavy rain to very heavy rain with common rainfall of 20 - 40mm, locally over 100mm. The rain will be concentrated in the late afternoon and night.
Other areas of the North, Thanh Hoa and the South in the afternoon and night of August 20 are forecast to have scattered showers and thunderstorms, locally heavy rain with rainfall of 10 - 30mm, locally over 60mm.
The meteorological agency warns of the risk of heavy rain with rainfall greater than 70mm within 3 hours.
During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind. 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.
