More heavy rain forecast for 53 provinces in Thailand

Heavy rain is expected to continue across Thailand, with 53 provinces particularly affected, including the upper northern, upper northeastern, and western southern regions. Residents in these areas should be cautious of flash floods and sudden water surges.

Today, the Thai Meteorological Department (TMD) issued a 24-hour weather forecast indicating increased rainfall and heavy downpours in certain areas. The upper northern regions, upper northeastern regions, and the western part of the southern region are expected to experience the most intense rain.

The public in these regions is advised to be vigilant against the dangers posed by heavy rainfall and accumulated precipitation, which could lead to flash floods and rapid water surges, particularly in foothills, near waterways, and low-lying areas.

The current weather conditions are due to the monsoon trough moving across the upper northern and northeastern regions, combined with a strengthening southwest monsoon over the Andaman Sea, Thailand, and the Gulf of Thailand.

A low-pressure system in upper Laos is contributing to increased wind and wave activity in the Andaman Sea and the Gulf of Thailand. The upper Andaman Sea is experiencing waves of 2 to 3 metres, with higher waves exceeding 3 metres in stormy areas.

The upper Gulf of Thailand has waves of approximately 2 metres, while the lower Andaman Sea has waves of 1 to 2 metres, with higher waves in stormy areas. Mariners in these regions are advised to navigate cautiously and avoid sailing in stormy areas. Small boats in the upper Andaman Sea should remain ashore during this period.

Heavy rain

The northern region will experience thunderstorms in 80% of the area, with heavy to very heavy rain in provinces such as Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Nan, Phrae, Uttaradit, Sukhothai, Tak, Kamphaeng Phet, Phitsanulok, Phichit, and Phetchabun. Temperatures will range from 23 to 26 degrees Celsius in the morning to 32 to 36°C in the afternoon. The southwest wind will blow at speeds of 5 to 15 kilometres per hour.

The northeastern region will have thunderstorms in 70% of the area, with heavy rain in provinces like Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Khon Kaen, Kalasin, Maha Sarakham, Nakhon Ratchasima, and Buriram. Temperatures will range from 22 to 26°C in the morning to 32 to 34°C in the afternoon, with southwesterly winds blowing at speeds of 10 to 20 kilometres per hour.

The central region is expected to have thunderstorms in 70% of the area, with heavy rain in provinces like Nakhon Sawan, Uthai Thani, Chai Nat, Sing Buri, Lop Buri, Saraburi, Kanchanaburi, and Ratchaburi. Morning temperatures will be between 24 to 25°C, rising to 34 to 35°C in the afternoon. Southwesterly wind will blow at speeds of 10 to 25 kilometres per hour.

In the eastern region, 70% of the area will experience thunderstorms, with heavy to very heavy rain in provinces such as Nakhon Nayok, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat. Temperatures will range from 24 to 27°C in the morning to 31 to 35°C in the afternoon. Southwesterly wind will blow at speeds of 20 to 35 kilometres per hour, with sea waves of about 2 metres, rising higher in stormy areas.

The eastern coast of the southern region will have thunderstorms covering 60% of the area, with heavy rain in provinces like Chumphon, Surat Thani, and Nakhon Si Thammarat. Temperatures will be between 24 to 26°C in the morning and 33 to 36°C in the afternoon.

From Surat Thani upwards, southwesterly wind will blow at speeds of 15 to 35 kilometres per hour, with sea waves of 1 to 2 metres, rising higher in stormy areas. From Nakhon Si Thammarat downwards, southwesterly wind will blow at speeds of 15 to 30 kilometres per hour, with sea waves of about 1 metre, rising higher offshore and in stormy areas.

Thunderstorms

On the western coast of the southern region, 80% of the area will experience thunderstorms, with heavy to very heavy rain in provinces such as Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun. Morning temperatures will be between 23 and 25°C, rising to 30 to 32°C in the afternoon.

From Phang Nga upwards, the southwest wind will blow at speeds of 20 to 40 kilometres per hour, with sea waves of 2 to 3 metres, rising higher in stormy areas. From Phuket downwards, southwesterly wind will blow at speeds of 15 to 35 kilometres per hour, with sea waves of 1 to 2 metres, rising higher in stormy areas.

Bangkok and its vicinity will see thunderstorms in 70% of the area, with heavy rain in some parts. Morning temperatures will range from 26 to 27°C, rising to 33 to 36°C in the afternoon. Southwesterly wind will blow at speeds of 10 to 25 kilometres per hour, reported KhaoSod.