On May 19, monitoring satellite cloud images, weather radar images and lightning positioning showed that the thunderstorm area was developing and causing rain with thunderstorms and lightning in Tan Phu district, Tan Binh district, Binh Chanh, District 12, Go Vap district, Thu Duc city, Hoc Mon district, Cu Chi district (HCMC).
In the next 0 - 3 hours, thunderstorms will continue to develop, causing showers, accompanied by thunderstorms and lightning in the above districts, then expanding to other neighboring areas.
Rainfall is generally from 10-30 mm, in some places over 40 mm. During thunderstorms, beware of tornadoes, hail and strong gusts of wind of about level 5-7 (8-17 m/s), heavy rain causing local flooding.
The thunderstorms are caused by a low pressure trough connecting with the hot low pressure area in the West with an axis at about 23-25 degrees North latitude moving south combined with a high-altitude wind convergence in the Northern region.
Above, the subtropical high pressure with an axis through the Central region weakens. The equatorial low pressure trough has an axis at about 6-8 degrees North latitude. The East wind convergence exists in the Southern region.
Weather forecast for the next 24-48 hours, around May 21, the low pressure trough with an axis of 25-28 degrees North latitude will form again. The equatorial low pressure trough has an axis at about 6-9 degrees North latitude.
From May 21, the southwest wind is likely to return to operation. Above, the subtropical high pressure with an axis through the Central region will operate stably, from May 21 it will weaken and retreat to the East.
Weather forecast for the next 3 days, the low pressure trough will have an axis at about 25-28 degrees North latitude, from around May 23, the low pressure trough will be compressed and pushed to the South.
In the South, the equatorial low pressure trough will gradually lift its axis to the North. The southwest wind will gradually become stronger. Above, the subtropical high pressure will weaken and gradually withdraw to the East.
Therefore, in the coming days, the weather in the South will tend to have increased thunderstorms, appearing more often and more frequently, with moderate and heavy rain in some places.
