People should beware of the severe weather conditions that may cause flash floods and water runoffs.
The southwest monsoon continues across the Andaman Sea and the South.
Meanwhile, the category 5 typhoon “Maysak” over the Pacific is moving towards the Korean peninsula on September 2-3, but it will have no effect on Thailand, the department said.
The weather forecast for the next 24 hours is as follows:
North: Mostly cloudy with thundershowers in 60 per cent of the areas and isolated heavy rain; minimum temperature 23-26 degrees Celsius, maximum 31-34°C.
Northeast: Mostly cloudy with thundershowers in 60 per cent of the areas and isolated heavy rain; minimum temperature 23-26°C, maximum 30-36°C.
Central: Cloudy with thundershowers in 80 per cent of the areas and isolated heavy rain; minimum temperature 24-27°C, maximum 36-37°C.
East: Mostly cloudy with thundershowers in 60 per cent of the areas and isolated heavy rain; minimum temperature 25-28°C, maximum 32-36°C; waves a metre high and 1-2 metres during thundershowers.
South (east coast): Mostly cloudy with thundershowers in 60 per cent of the areas; minimum temperature 23-25°C, maximum 33-37°C; waves less than a metre high and one metre during thundershowers.
South (west coast): Mostly cloudy with thundershowers in 60 per cent of the areas; minimum temperature 24-26°C, maximum 33-34°C; waves a metre high and two metres during thundershowers.
Bangkok and surrounding areas: Cloudy with thundershowers in 80 per cent of the areas and isolated heavy rain; minimum temperature 25-27°C, maximum 32-37°C.