Weather warning for heavy monsoon rains in 47 provinces

The Thai Meteorological Department (TMD) issued a weather warning for heavy monsoon rains expected to affect 47 provinces, including Bangkok, with a 70% chance of heavy rainfall. Flash floods and forest runoff are also anticipated.

The 24-hour forecast predicts moderate southwesterly monsoons covering the Andaman Sea, Thailand, and the Gulf of Thailand, coupled with a low-pressure area over northern Vietnam. This weather pattern is likely to cause thunderstorms and heavy rain in several parts of Thailand. Residents in these areas are advised to be cautious of heavy rainfall and accumulated rain, which can lead to flash floods and forest runoff, particularly in foothill regions near waterways and low-lying areas.

In the upper Andaman Sea and the upper Gulf of Thailand, sea waves are expected to reach approximately 2 metres, with areas experiencing thunderstorms seeing waves over 2 metres high. Mariners in these regions are advised to navigate carefully and avoid sailing in stormy areas.

From tomorrow to the nex four days, a strong monsoon trough will move across northern and northeastern regions, linking to a strong low-pressure area in the central South China Sea. The strengthening southwesterly monsoon will cover the Andaman Sea, Thailand, and the Gulf of Thailand, resulting in increased rainfall and heavy downpours in multiple areas, especially in the northern, northeastern, central, eastern, and western southern regions.

Wave conditions in the upper Andaman Sea and the upper Gulf of Thailand will intensify, with waves reaching 2 to 3 metres and stormy areas seeing waves over three metres. In the lower Andaman Sea and lower Gulf of Thailand, waves are expected to be around 2 metres, with stormy areas experiencing waves above 2 metres.

The weather forecast for Thailand from 6am today to 6am tomorrow is as follows:

The northern region will experience thunderstorms in 40% of the area, mainly in Chiang Mai, Chiang Rai, Phayao, Nan, Phrae, Phitsanulok, Kamphaeng Phet, Phichit, and Phetchabun. Temperatures will range from 24 to 26 degrees Celcius in the morning to 32 to 35°C in the afternoon, with southwesterly winds at 10 to 20 kilometres per hour.

Other regions

The northeastern region will see thunderstorms in 60% of the area, with heavy rain in Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Mukdahan, Yasothon, Amnat Charoen, Sisaket, and Ubon Ratchathani. The temperature will be between 24 and 26°C in the morning and 32 and 34°C in the afternoon, with southwesterly winds at 10 to 25 kilometres per hour.

The central region will experience thunderstorms in 60% of the area, with heavy rain in Lopburi, Saraburi, Phra Nakhon Si Ayutthaya, Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkhram, and Samut Sakhon. Morning temperatures will be 24 to 26°C, rising to 34 to 36°C in the afternoon, with southwesterly winds at 10 to 25 kilometres per hour.

The eastern region will experience thunderstorms in 70% of the area, with heavy rain in Nakhon Nayok, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat. Temperatures will range from 23 to 26°C in the morning to 30 to 34°C in the afternoon, with southwesterly winds at 20 to 35 kilometres per hour. Sea waves will reach about 2 metres, with stormy areas seeing waves over 2 metres.

The eastern southern region will see thunderstorms in 60% of the area, with heavy rain in Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, and Songkhla. Morning temperatures will be 23 to 25°C, rising to 32 to 33°C in the afternoon. From Surat Thani upwards, southwesterly winds will blow at 15 to 35 kilometres per hour, with sea waves reaching 1 to 2 metres and stormy areas seeing waves over 2 metres. From Nakhon Si Thammarat downwards, southwesterly winds will blow at 15 to 30 kilometres per hour, with sea waves around 1 metre and stormy areas seeing waves over 1 metre.

The western southern region will see thunderstorms in 70% of the area, with heavy rain in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun. Temperatures will range from 24 to 25°C in the morning to 27 to 31°C in the afternoon. From Phuket upwards, southwesterly winds will blow at 20 to 35 kilometres per hour, with sea waves around 2 metres and stormy areas seeing waves over 2 metres. From Krabi downwards, southwesterly winds will blow at 15 to 35 kilometres per hour, with sea waves reaching 1 to 2 metres and stormy areas seeing waves over 2 metres.

Bangkok and its surrounding areas will experience thunderstorms in 70% of the area, with heavy rain expected in some parts. Temperatures will range from 25 to 26°C in the morning to 32 to 35°C in the afternoon, with southwesterly winds at 10 to 25 kilometres per hour, reported KhaoSod.