On the afternoon of May 20, 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 Cu Chi district. Thunderstorms in the Dong Nai area also tend to move towards Ho Chi Minh City.
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 8-40 mm, in some places over 50 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 figure causes thunderstorms is due to low pressure grooves connecting the western low pressure area with axial shaft over 24-27 degrees North latitude. Above high, subtropical high pressure with axis through the central maintenance. The south, the equatorial low-pressure trench is about 6-9 degrees the north latitude moving to the north.
Weather forecast for the next 24-48 hours, the low pressure trough connecting with the hot low pressure area in the West has an axis through 24-27 degrees North latitude, then being compressed to the South by the strengthening of the continental cold high pressure.
Weather forecast for the next 3-10 days, the low pressure trough connecting with the hot low pressure area in the West has an axis through 24-27 degrees North latitude, then being compressed to the south by the continental cold high pressure strengthening and fading away.
Above high, subtropical high pressure with axial shaft to raise the axis to the north and withdraw to the east. The south, the equatorial low -pressure groove moves to the north to the South and the South Central region connected to the strong low vortex area in the northern region of Truong Sa Archipelago. The Southwest monsoon is strongly active.
Therefore, the thunderstorms in the South tend to increase. Rain will appear more often and more frequently, with moderate and heavy rain in some areas.
