The rather strong high-pressure system from China extend to upper Thailand and the South China Sea while the westerly trough will move pass Myanmar, the North of Thailand, and upper Laos. The moderate northeast monsoon prevails over the Gulf, the South and the Andaman Sea. Cool in the morning with isolated rains are forecast in the upper country. Isolated heavy to very heavy rains are forecast in the South. In the Andaman Sea and the Gulf will strengthen, the waves will be 2-3 meters high in thundershower areas.