According to the National Center for Hydro-Meteorological Forecasting, last night and early this morning (8.20), the mountainous areas of the North had scattered showers and thunderstorms, with some places having heavy rain.
Rainfall from 7pm on August 19 to 8am on August 20 was over 40mm in some places such as: Pa Ham (Dien Bien) 74.2mm, Nam Han (Lai Chau) 47.6mm, Ca Nang (Son La) 40.8mm, Doan Tinh (Quang Ninh) 40.2mm,...
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.