The weak southwest monsoon prevailing over the Andaman Sea, Thailand and the Gulf is strengthening while the low pressure cell covers upper Vietnam. More rains and isolated heavy rains are likely in Thailand with isolated very heavy rain in the East regions. The moderate wind and waves in the upper Andaman Sea are likely 1-2 meters high and above 2 meters high in thundershowers. In the lower Andaman Sea and the Gulf, the waves are likely about 1 meter high and above 2 meters high in thundershowers.