The Meteorological Department today warned people in the South from Surat Thani to Narathiwat provinces of heavy rains and strong winds from today and told them to brace for possible flash floods.
Other parts of the country, including, Bangkok, will expect dropping temperatures from 2-6 degrees Celsius.
In the latest announcement issued, it said northeasterly monsoon which is blowing pass the Gulf of Thailand and the South has been strengthened.
This will result in increased heavy to very heavy rains in the South during November 23-28 particularly in Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Phuket, Krabi, Trang, and Satun.
It told people living in these provinces to get ready for surface runoff and flash flood.
For the areas in the Gulf of Thailand and the Andaman Sea, it said high waves of 2-3 metres are expected, and advised fishermen to take caution in sailing to high sea for fishing.
It said small boats should be left on shore.
For residents living near the coast, they are advised to brace for high waves hitting the shores.
Meanwhile it said strong cold spell from China has now blanketed Thailand's northeastern region and is moving down to cover the north, central , the eastern regions, and Greater Bangkok today.
It's arrival in the Northeast will result in dropping temperatures 2-6 degrees Celsius, while other regions, the temperatures will decline 2-4 degrees.
It advised people totaled care of their health due to frontage dropping temperatures.
Source: Thai Public Broadcasting Service (Thai PBS)