Currently, the low pressure trough with an axis at about 25-28 degrees North latitude connecting with the low pressure area in the West tends to expand to the East. Around May 22, the low pressure trough will squeeze south and gradually increase due to a part of the continental high pressure strengthening.
The South is affected by the southern edge of the above weather system combined with the northern edge of the low pressure trough with an axis of 5-8 degrees North latitude, which tends to lift its axis to the North and become more active.
The wind changes direction with weak intensity to the southwest wind with increasing intensity; some days of the weekend have medium to strong intensity.
Above high, subtropical high pressure has weak intensity and gradually withdraws to the east and lifts the axis to the north. The West Wind School dominates the area of 6,000 m in the range of 22-25.5. From 26-28.5, a wind divergence area on the overhead atmosphere dominates the area of the region.
Therefore, on May 21, the Southern region will have scattered showers and thunderstorms, mainly occurring in the late afternoon and evening. The rainfall tends to increase compared to recent days; the rainfall is generally from light to moderate. The highest temperature is commonly 32-34 degrees Celsius; the lowest temperature is 24-26 degrees Celsius.
From May 22-25, there will be scattered showers and thunderstorms in many places, with some places having moderate to heavy rain. The highest temperature is commonly 30-33 degrees Celsius.
On May 26-28, the rain will decrease, with scattered showers and thunderstorms in common areas. Temperature increases, the highest is commonly 33-35 degrees Celsius, some places above 35 degrees Celsius.
On May 29-31, the area will have scattered showers and thunderstorms; The highest temperature is generally 32-34 degrees Celsius.
During thunderstorms, it is necessary to be on guard against tornadoes, lightning, gusts of wind, hail that can endanger people and property damage; be on guard against heavy rain, localized heavy rain that can cause deep flooding on some roads in the central area of Ho Chi Minh City.
