The Meteorological Department of Thailand has issued a weather forecast for the next 24 hours, warning of increased rainfall across the country, with heavy downpours expected in some areas. The northern and upper northeastern regions will be particularly affected as the monsoon trough shifts downward, stretching across these areas and into a low-pressure system over the central South China Sea. This situation, combined with moderate southwest monsoon winds over the Andaman Sea, Thailand, and the Gulf of Thailand, will lead to more widespread rainfall.
Residents in affected areas are advised to be vigilant for heavy rainfall and accumulated precipitation, which may cause flash floods and rapid water runoff.
Upper Andaman Sea: Moderate winds with waves reaching about 2 meters in height. In stormy areas, waves may exceed 2 meters.
Lower Andaman Sea and Upper Gulf of Thailand: Waves ranging from 1 to 2 meters, with heights surpassing 2 meters during thunderstorms.
Seafarers in these areas should exercise caution and avoid sailing in regions experiencing thunderstorms.
Outlook for September 3-6: The moderate monsoon trough is expected to further shift across northern, central, and northeastern Thailand into a strong low-pressure system over the central South China Sea. This will result in heavy rainfall in some areas, with the possibility of very heavy rain in parts of the lower northern region, lower northeastern region, central region, including Bangkok and its vicinity, as well as the eastern and southern regions. Marine conditions will also worsen, with the Andaman Sea expected to see waves between 2-3 meters high, and even higher during thunderstorms. The upper Gulf of Thailand will experience waves around 2 meters, with stormy areas exceeding this height.
Tropical Storm “Shanshan”: Currently located over southern Kansai, Japan, Tropical Storm “Shanshan” poses no threat to Thailand’s weather. However, travelers to the affected regions in Japan are advised to check weather conditions before departure.
North: 60% chance of thunderstorms with isolated heavy rain, especially in Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, Uttaradit, Phitsanulok, Tak, and Phetchabun. Temperatures will range from 24-26°C (low) to 31-36°C (high). Southwest winds at 10-15 km/h.
Northeast: 70% chance of thunderstorms with isolated heavy rain in Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Yasothon, Amnat Charoen, Ubon Ratchathani, Chaiyaphum, and Nakhon Ratchasima. Temperatures will range from 24-26°C (low) to 32-34°C (high). Southwest winds at 10-20 km/h.
Central: 60% chance of thunderstorms with isolated heavy rain, particularly in Lopburi, Saraburi, Kanchanaburi, and Ratchaburi. Temperatures will range from 23-26°C (low) to 34-36°C (high). Southwest winds at 10-20 km/h.
East: 70% chance of thunderstorms with isolated heavy rain, particularly in Nakhon Nayok, Chachoengsao, Prachinburi, Sa Kaeo, Rayong, Chanthaburi, and Trat. Temperatures will range from 23-27°C (low) to 31-35°C (high). Southwest winds at 15-35 km/h. Waves at 1-2 meters, exceeding 2 meters in stormy areas.
South (East Coast): 30% chance of thunderstorms, mainly in Phetchaburi, Surat Thani, Nakhon Si Thammarat, Songkhla, Yala, and Narathiwat. Temperatures will range from 23-26°C (low) to 33-36°C (high).
South (West Coast): 40% chance of thunderstorms, mainly in Ranong, Phang Nga, and Phuket. Temperatures will range from 24-26°C (low) to 31-34°C (high).
Bangkok and Vicinity: 60% chance of thunderstorms with isolated heavy rain. Temperatures will range from 26-28°C (low) to 33-35°C (high). Southwest winds at 10-20 km/h.
