The high-pressure system from China will extend to the upper country and the South China Sea leading to the easterly wind bring the moisture from the South China Sea and the Gulf to the upper country and the upper South while the monsoon trough lying across the middle South is strengthening. Continuous rainfalls and isolated heavy to very heavy rains are forecast in the South while variable weathers are possible following with thundershowers, gust and isolated heavy rains including lightning strike in the Northeast and the North for the first period then the rest regions. In the Andaman Sea and the Gulf, the waves will be higher than 2 meters high in thundershower areas.