On the afternoon of June 18, according to data from satellite cloud images, weather radar images and lightning positioning systems, thunderstorm clouds are developing strongly, causing showers with thunderstorms and lightning in many localities in the Southern region including Vinh Long, An Giang, Dong Nai, and Can Tho City provinces.
Forecast for the next 0-3 hours, thunderstorm clouds will continue to develop, causing showers and thunderstorms in the above areas, and at the same time tend to expand to neighboring areas. Common rainfall is from 5-15 mm, in some places over 15 mm. During thunderstorms, people need to be wary of tornadoes, lightning, hail and strong gusts of wind at level 5-8 (8-21 m/s).
Regarding the weather situation in the next 24-48 hours, the low pressure trough with axis of about 24-27 degrees North latitude connected to the hot low pressure area in the West continues to develop and gradually expand to the Southeast. Southwest monsoon in the South area operates with weak to moderate intensity. Above, the subtropical high pressure with its axis passing through the Central Central region continues to gradually encroach westward.
In the period from 3-10 days, this low pressure trough will continue to develop and expand southeastward, then is likely to be compressed and gradually move southward in the last days of the forecast period. The Southwest monsoon maintains weak to moderate intensity and tends to strengthen from around June 23.
Above, the subtropical high pressure continues to encroach westward and raise its axis to the North; by about June 21-22, it will weaken and gradually withdraw eastward. Notably, wind convergence at high altitude is likely to form and maintain in the Southern region from June 23-27.
Due to the impact of the above weather patterns, the South is forecast to continue to experience scattered showers and thunderstorms, with common rainfall from 10-30 mm, locally over 80 mm, mainly concentrated in the late afternoon and evening.
The meteorological agency warns that accompanying extreme weather phenomena such as tornadoes, lightning, hail and strong gusts of wind can cause damage to agricultural production, causing trees to fall, affecting houses, traffic works and technical infrastructure. Localized heavy rain also poses a risk of flooding, causing difficulties for traffic, living and production activities of people.
