The Thai Meteorological Department (TMD) has issued a weather advisory warning of a 1 to 2 degrees Celsius drop in temperatures accompanied by strong winds across upper Thailand, while heavy downpours threaten to trigger flash floods and forest runoff in southern provinces.
The weather agency attributed the shift to a moderately strong high-pressure system from China spreading over upper Thailand and the South China Sea. Meanwhile, a westerly wind trough is moving across Myanmar and northern Thailand, as moderate northeast monsoons sweep over the Gulf of Thailand, the South, and the Andaman Sea.
Upper Thailand will generally experience cooler morning weather and brisk winds. Isolated thundershowers and gusty winds are expected across parts of the upper North, particularly in Mae Hong Son, Chiang Mai, and Chiang Rai.
Highland areas across the northern and northeastern regions will see cold condition on mountain peaks, where minimum temperatures could dip to between 9 and 15C. Residents in upper Thailand are urged to take care of their health as temperatures drop, while farmers should take measures to protect agricultural produce from strong winds.
In contrast, torrential rain is expected to hit up to 70 percent of the South's east coast, with heavy downpours targeted over Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat. The west coast will also see thundershowers across 40 percent of the region, mainly in Ranong, Phangnga, Trang, and Satun.
Authorities have advised residents near foothills, waterways, and low-lying areas in the South to prepare for potential flash floods and runoff resulting from sustained rainfall.
Sea conditions in both the Gulf of Thailand and the Andaman Sea are expected to worsen. Waves in the lower Gulf of Thailand and offshore areas will reach around 2 metres, exceeding 2 metres during thundershowers. Mariners are urged to navigate with caution and avoid areas experiencing stormy weather.
In Greater Bangkok, cool morning air with strong winds is expected alongside a 1 to 2 degrees Celsius drop in temperature, with light isolated rain possible. Temperatures in the capital will range from a minimum of 22 to 23C to a maximum of 32 to 34C.
