The below has been recently updated to now include Prachuap Khiri Khan:
"Heavy to Very Heavy Rain in Lower South and Strong Wind Waves in Gulf"
No. 30 Time Issued : January 5, 2017
The strong northeast monsoon still prevails over the Gulf of Thailand and the South, and the low pressure cell over the lower Andaman Sea is moving north slowly to Myanmar. Persistent rains are forecast with torrential rain for following provinces: Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si, Thammarat, Phatthalung, Ranong, Phangnga, Phuket and Krabi. People should beware of the severe weather conditions and possible flash flood. Outbreaks of rain spells will ease off in the South by 8 January. Keep following closely the weather forecast update.
The strong winds force waves up to 2-3 meters high in the Gulf and Andaman Sea. People should beware of inshore surge. All ships should proceed with caution, and small boats keep ashore in the following 1-2 days.
The westerly trough from Myanmar across the North results in upper Thailand with outbreaks of rain spells. People should stay safe and keep healthy due to the change of weather conditions.
The advisory is in effect on 5 January 2017 at 11.00 a.m.
The next issue will be at 5.00 p.m., 5 January 2017
(Signed) Wanchai Sakudomchai
(Mr. Wanchai Sakudomchai)
Thai Meteorological Department
Just 8 days of global military spending could fund 12 years of free, quality education for every child on the planet