The Meteorological Department has warned people in upper Thailand to prepare for variable and cooler weather with temperatures dropping 4-6°C in the Northeast.
The rather strong high pressure zone from China was expected to move over the upper Northeast on Wednesday and would then cover the North, the Central and the East, the department said on Tuesday.
It would initially bring thunderstorms and some heavy rain to parts of the lower Northeast, East and Central regions. Cooler weather would follow, especially in the Northeast where temperatures would decrease by 4-6°C.
People were advised to be ready for the changing weather conditions to ensure they stay healthy. Farmers should be prepared to protect crops from possible rain damage.
The moderate northeast monsoon across the Gulf and the South of Thailand is still continual, often heavy rain to parts of this region. Moderate to strong wind waves were forecast for the Gulf of Thailand up to two metres high. All shipping should proceed with caution.