It advised people in risky areas to beware of severe conditions that may cause flash floods.
Here’s the weather forecast for the next 24 hours:
Bangkok and surrounding areas: Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 24-26 degrees, highs of 31-34 degrees Celsius.
North: Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 23-25 degrees and highs of 32-34 degrees Celsius.
Northeast: Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 24-25 degrees and highs of 32-34 degrees Celsius.
Central: Thundershowers in 80 per cent of the area with isolated heavy rains; temperature lows of 24-25 degrees, highs of 32-34 degrees Celsius.
East: Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 23-25 degrees, highs of 31-34 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 23-25 degrees, highs of 32-34 degrees Celsius; waves a metre high and 1-2 metres during thundershowers.
South (west coast): Thundershowers in 70 per cent of the area with isolated heavy rains; temperature lows of 20-25 degrees, highs of 30-33 degrees Celsius; waves 1-2 metres high and 2 metres during thundershowers.