On the afternoon of September 27, combined with monitoring on satellite cloud images, lightning location data and weather radar images, it was shown that convective clouds formed and developed in the areas of Long An, Ho Chi Minh City, Dong Thap, Dong Nai, and Ba Ria - Vung Tau provinces.
From now until the next 4 hours, these convective clouds will cause showers and thunderstorms in the above mentioned area, then continue to develop and expand, causing rain in neighboring districts of the above mentioned provinces and neighboring provinces. During the thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
The thunderstorms are caused by the weakening of the continental high pressure and its movement to the East. The wind is weak over the South China Sea. Above, the subtropical high pressure encroaches on the West with an axis through the Central region. The high-altitude East wind disturbance exists over the South China Sea and moves to the West.
Weather forecast for the next 24-48 hours, wind direction changes with weak intensity in the Southern sea areas. Above, subtropical high pressure encroaches on the west and has an axis through the Central region.
Around September 30, a new low pressure trough formed with an axis through the Central region connecting with a tropical cyclone in the Northeast of the Philippines. From October 1, the continental cold high pressure increased to the North of our country, compressing and pushing the low pressure trough to gradually move south through the South Central region. The wind changed direction and became weak over the Southern seas. Above, the subtropical high pressure continued to encroach on the West, gradually weakening from September 30.
Therefore, in the next 3 days, the Southern region will have scattered showers and thunderstorms, locally heavy rain with rainfall from 10-30mm, locally over 50mm (rain concentrated in the afternoon and evening).
