Heavy rain warning for three Thai regions, Bangkok to see showers

The Meteorological Department of Thailand (TMD) issued a warning for heavy rain in three regions, with the northern region expected to face 70% rainfall. Bangkok will experience heavy showers from afternoon to evening. Residents are advised to be cautious of potential flooding and flash floods.

The weather forecast for today indicates a possibility of heavy rainfall in the northern, upper northeastern, and eastern regions of Thailand. The TMD urged residents in these areas to stay alert due to the risk of heavy rain and accumulated rainfall, which could lead to flash floods and overflowing rivers, particularly in hilly regions and near waterways.

A moderate monsoon trough currently extending across the upper northern region of Thailand and upper Laos, moving towards a low-pressure area over northern Vietnam and the Gulf of Tonkin, is the cause of this weather pattern. Additionally, the moderate southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand is contributing to these conditions.

The TMD also forecasted increased monsoon activity and heavier rain in the next ten days, with some areas expected to experience very heavy rainfall. The upper Andaman Sea and the upper Gulf of Thailand will witness moderate wind and wave conditions. Waves are expected to reach 1 to 2 metres, with areas experiencing thunderstorms seeing waves exceeding 2 metres.

Mariners are advised to avoid sailing in thunderstorm-prone areas. Concurrently, a powerful tropical storm named Ampil is affecting southern Japan. Travellers planning to visit this region should check weather updates before their journey.

For the northern region, thunderstorms are expected in 70% of the area, with heavy rainfall in certain provinces such as Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, Phrae, and Tak. The temperature will range from a minimum of 23 to 26°C to a maximum of 32 to 36°C, with southwesterly winds blowing at speeds of 5 to 15 kilometres per hour.

Heavy rain

In the northeastern region, thunderstorms are expected in 40% of the area with heavy rain in Nong Khai, Bueng Kan, Sakhon Nakhon, and Nakhon Phanom provinces. Temperatures will vary between 23 and 26°C and 33 and 37°C, with southwesterly winds at 10 to 20 kilometres per hour.

The central region will see thunderstorms covering 60% of the area, particularly in Kanchanaburi, Ratchaburi, Suphan Buri, Nakhon Pathom, Saraburi, and Phra Nakhon Si Ayutthaya. Temperatures will range from 24 to 26°C to 35 to 37°C, with southwesterly winds at 10 to 25 kilometres per hour.

The eastern region is forecasted to have thunderstorms in 40% of the area, with heavy rain in Nakhon Nayok, Chanthaburi, and Trat. Temperatures will be between 24 and 28°C and 32 and 36 °C. Winds will be southwesterly at 15 to 30 kilometres per hour, with waves about 1 metre high, and higher in areas with thunderstorms.

In the southern region (eastern coast), 30% of the area will experience thunderstorms, mainly in Phetchaburi, Surat Thani, Nakhon Si Thammarat, Phatthalung, and Songkhla. Temperatures will range from 24 to 26°C to 34 to 36°C, with southwesterly winds at 15 to 30 kilometres per hour and waves about 1 metre high, increasing in thunderstorm areas.

The southern region (western coast) will also see thunderstorms in 30% of the area, mainly in Ranong, Phang Nga, Trang, and Satun. Temperatures will be between 24 and 27°C and 33 and 35°C.

Winds from the southwest will blow at 15 to 35 kilometres per hour in Ranong and upwards, with waves reaching 1 to 2 metres and higher in thunderstorm areas. From Phang Nga downwards, winds will be at 15 to 30 kilometres per hour and waves about 1 metre high, increasing in thunderstorm areas.

Bangkok and surrounding areas will experience thunderstorms in 60% of the area, mostly from afternoon to evening. Temperatures will range from 25 to 27°C to 34 to 36°C, with southwesterly winds at 10 to 25 kilometres per hour.