The monsoon through moves down to lie across the Central, the upper South and the East into the active low pressure cell over the South China Sea with the southeasterly wind prevails over the lower Northeast, the East and the upper Gulf while the moderate southwest monsoon prevails over the Andaman Sea, the South and the Gulf. Isolated heavy rain remains in the lower Northeast, the Central including Bangkok and vicinity, the East and the South. People in the areas especially of the South should beware of heavy rains and its accumulation that may cause flash flood and overflows, especially along foothills near waterways and lowlands. The wind and waves in the upper Andaman Sea are expected 1-2 meters high and above 2 meters high in thundershowers. In the lower Andaman Sea and the Gulf, the waves are expected about 1 meter high and above 2 meters high in thundershowers. All ships should proceed with caution and keep off thundershowers.