Bangkok: Tropical Storm “Bualoi” has weakened into a strong low-pressure area, but the threat of accumulated rain remains in Thailand, particularly in the northern and upper northeastern regions, over the next one to two days.
According to Thai News Agency, the Meteorological Department reported that the storm will continue to impact the region with heavy rainfall, risking river overflows and flash floods before conditions begin to improve.
Mr. Somkuan Tonjan, Director of the Meteorological Department’s Weather Forecasting Division, disclosed that late last night, Bualoi weakened into a strong low-pressure area over Luang Namtha Province, Laos, and is expected to move into northern Thailand today. The monsoon trough passing through northern Myanmar and northern Thailand will lead to continuous rainfall in many areas, with heavy rainfall likely in some regions.
Today’s heavy rain risk areas include 36 provinces across Thailand. In the northern region, these are Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phitsanulok, Phichit, and Phetchabun. The northeastern region includes Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Chaiyaphum, and Khon Kaen. The central region is at risk in Nakhon Sawan, Uthai Thani, Chainat, Lopburi, and Kanchanaburi, as well as Bangkok and its vicinity. In the eastern region, Chachoengsao, Chon Buri, Rayong, and Chanthaburi are at risk, along with Ranong and Phang Nga in the southern region.
Residents in these at-risk areas are advised to exercise caution due to the dangers of accumulated rainfall, which could result in flash floods and mudslides, particularly on hillsides, near waterways, and in low-lying areas. From October 1-6, 2025, a decrease in rainfall is anticipated as the monsoon trough weakens and shifts across the central and eastern regions. Meanwhile, the southwest monsoon covering the Andaman Sea, southern Thailand, and the Gulf of Thailand is also weakening.
During this time, waves in the Andaman Sea and the Gulf of Thailand will remain moderate. The upper Andaman Sea will see waves approximately 2 meters high, while the lower Andaman Sea and the upper Gulf of Thailand will experience waves ranging from 1-2 meters high. In areas with thunderstorms, waves will exceed 2 meters. Mariners are urged to proceed with caution and continuously monitor weather updates from the Meteorological Department.
The department is urging the public to heed warning announcements from the government, especially in areas at risk due to the ongoing accumulation of rain over the next 1-2 days.