During 18-22 Nov, the moderate high pressure area from China will extend to the upper North, the Northeast of Thailand and the South China Sea. During 19-20 Nov, The westerly trough form Myanmar will move to the upper North and the Northeast. Cooler weather and 2-3 °C drop in temperature is expected over Thailand. The stronger easterly winds will prevail across the Gulf and the South of Thailand. Increasing rain with isolated heavy rain is expected in the South and about 2 meters of wave height in the Gulf.