It warned people to beware of rain water accumulation that may cause flash floods.
The department also mentioned tropical storm Conson, which is presently over central Philippines and moving west-northwest into the South China Sea. It will head to the Gulf of Tonkin on September 12-13.
Here’s the weather forecast for the next 24 hours:
Bangkok and surrounding areas: Thundershowers in 80 per cent of the area with isolated heavy rains; temperature lows of 26-27 degrees, highs of 31-32 degrees Celsius.
North: Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 23-25 degrees and highs of 32-35 degrees Celsius.
Northeast: Thundershowers in 80 per cent of the area with isolated heavy to very heavy rains; temperature lows of 23-25 degrees and highs of 32-34 degrees Celsius.
Central: Thundershowers in 80 per cent of the area with isolated heavy to very heavy rains; temperature lows of 24-26 degrees, highs of 30-33 degrees Celsius.
East: Thundershowers in 80 per cent of the area with isolated heavy to very heavy rains; temperature lows of 23-26 degrees, highs of 29-32 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.
South (east coast): Thundershowers in 60 per cent of the area with isolated heavy rains; temperature lows of 24-25 degrees, highs of 31-35 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.
South (west coast): Thundershowers in 70 per cent of the areas with isolated heavy rains; temperature lows of 21-26 degrees, highs of 30-33 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.