Impending heavy rainfall threatens 40 Thai provinces, Bangkok residents warned of potential flash floods

Heavy rainfall has been forecasted by the Thailand Meteorological Department (TMD) for today, affecting 40 provinces, including Bangkok. The capital city is expected to witness heavy rainfall covering 60% of the area, urging residents to be cautious of potential flash floods and sudden runoff.

The weather prediction for the next 24 hours is due to a high-pressure system or a mass of cold air weakening its coverage over northern Thailand and the South China Sea. This phenomenon allows the east and southeast winds to prevail over the lower northeast, the lower central region, including Bangkok and its vicinity, and the east.

This condition results in thunderstorms over northern Thailand and heavy rainfall in some parts of the east. On the other hand, the trough crossing the middle south combined with a low-pressure cell covering the south and the southwest monsoon is weakening but still prevailing over the Andaman Sea, the lower south, and the lower Gulf.

This causes heavy rainfall in some areas of the south. Residents in the mentioned areas are warned to be wary of dangers from heavy rains and accumulated rainfall that could lead to flash floods and sudden runoff, especially in areas near mountain slopes, waterway passages, and low-lying areas. They are also urged to exercise caution when driving through areas with thunderstorms.

For the Andaman Sea and the Gulf, waves are about one metre high. In thunderstorm areas, waves are more than 2 metres high. Boat operators are advised to proceed with caution and avoid areas with thunderstorms, reported KhaoSod.

The weather forecast for Thailand from 6am today to 6am tomorrow: in the north, thunderstorms are covering 40% of the area, mainly in Mae Hong Son, Chiang Mai, Tak, Kamphaeng Phet, Phichit, Phitsanulok, and Phetchabun provinces. The lowest temperature is 22 to 24 degrees Celsius and the highest is 32 to 35 degrees Celsius with east winds at a speed of 10 to 15 kilometres per hour.

Thunderstorms

In the northeast, heavy rainfall and thunderstorms are covering 40% of the area, mainly in Loei, Nakhon Phanom, Chaiyaphum, Khon Kaen, Maha Sarakham, Roi Et, Yasothon, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket, and Ubon Ratchathani provinces. The lowest temperature is 22 to 25 degrees Celsius, and the highest is 32 to 34 degrees Celsius with east winds at a speed of 10 to 20 kilometres per hour.

In the central region, thunderstorms are covering 60% of the area, mainly in Nakhon Sawan, Uthai Thani, Kanchanaburi, Suphan Buri, Ratchaburi, Nakhon Pathom, Samut Songkhram, and Samut Sakhon provinces. The lowest temperature is 24 to 26 degrees Celsius, and the highest is 31 to 34 degrees Celsius with east winds at a speed of 10 to 25 kilometres per hour.

In the east, thunderstorms are covering 60% of the area and heavy rain in some places in Chon Buri, Rayong, Chanthaburi, and Trat provinces. The lowest temperature is 24 to 26 degrees Celsius, and the highest is 30 to 33 degrees Celsius, with southeast winds at a speed of 15 to 30 kilometres per hour. The sea waves are about one metre high. In thunderstorm areas, waves are more than two metres high.

In the south (east coast), thunderstorms are covering 60% of the area and heavy rain in some places in Prachuap Khiri Khan, Chumphon, Surat Thani, and Nakhon Si Thammarat provinces. The lowest temperature is 23 to 25 degrees Celsius, and the highest is 31 to 34 degrees Celsius.

From Surat Thani province and upwards, there are variable winds at a speed of 15 to 30 kilometres per hour. The sea waves are about one metre high. In thunderstorm areas, waves are more than two metres high. From Nakhon Si Thammarat province and downwards, there are southwest winds at a speed of 15 to 30 kilometres per hour. The sea waves are about 1 metre high. In thunderstorm areas, waves are more than 2 metres high.

In the south (west coast), thunderstorms are covering 60% of the area and heavy rain in some places in Ranong, Phangnga, Phuket, and Krabi provinces. The lowest temperature is 23 to 25 degrees Celsius, and the highest is 31 to 34 degrees Celsius with west winds at a speed of 15 to 30 kilometres per hour. The sea waves are about 1 metre high. In thunderstorm areas, waves are more than 2 metres high.

In Bangkok and its vicinity, thunderstorms are covering 60% of the area. The lowest temperature is 25 to 27 degrees Celsius and the highest is 32 to 34 degrees Celsius with east winds at a speed of 10 to 20 kilometres per hour.