Heavy rains and flash floods to hit 31 Thai provinces tomorrow

The Thai Meteorological Department (TMD) issued a weather forecast for tomorrow, warning that heavy rains will hit 31 provinces, with two regions expected to be particularly affected. The forecast predicts that 70% of the areas in these regions will experience significant rainfall, and the public is advised to be cautious of potential dangers such as flash floods and forest runoff.

The TMD’s 24-hour forecast, starting at 6pm today, August 7, indicates that the southwestern monsoon continues to cover the Andaman Sea, Thailand, and the Gulf of Thailand. Additionally, a low-pressure area over northern Vietnam is contributing to thunderstorms and heavy rainfall in northern, eastern, and southern Thailand.

Residents in these areas should be vigilant against heavy and accumulated rainfall, which could lead to flash floods and rapid water flow, especially in low-lying regions and areas near watercourses. The Department of Disaster Prevention and Mitigation specifically advised 10 provinces, including Bangkok, to closely monitor the Chao Phraya River’s water levels from August 8 onwards.

The monsoon’s impact is expected to bring heavy rain to 34 provinces, including Bangkok, with 70% of the areas experiencing significant rainfall.

In the upper Andaman Sea, particularly from Ranong province upwards, waves are expected to reach 1 to 2 metres and over 2 metres in areas with thunderstorms. Mariners are advised to exercise caution and avoid navigating through stormy areas during this period.

For the northern region, the forecast predicts thunderstorms covering 70% of the area with some heavy rainfall in Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Nan, Tak, Kamphaeng Phet, and Phetchabun provinces. Temperatures will range from 23 to 26 degrees Celsius at night to 31 to 35 degrees Celsius during the day, with southwesterly winds blowing at speeds of 5 to 15 kilometres per hour.

The northeastern region will experience thunderstorms in 40% of the area, mainly in Nong Khai, Bueng Kan, Sakon Nakhon, and Nakhon Phanom provinces. Temperatures will range from 24 to 26 degrees Celsius at night to 34 to 36 degrees Celsius during the day, with southwesterly winds blowing at speeds of 10 to 20 kilometres per hour.

Heavy rain

In the central region, 60% of the area will face thunderstorms, particularly in Kanchanaburi, Ratchaburi, Suphan Buri, Ayutthaya, Ang Thong, and Saraburi provinces. Temperatures will range from 24 to 26 degrees Celsius at night to 34 to 36 degrees Celsius during the day, with southwesterly winds blowing at speeds of 10 to 20 kilometres per hour.

The eastern region is expected to have thunderstorms covering 70% of the area, with heavy rainfall in Rayong, Chanthaburi, and Trat provinces. Temperatures will range from 25 to 26 degrees Celsius at night to 32 to 36 degrees Celsius during the day. The southwesterly winds will blow at speeds of 15 to 30 kilometres per hour, with sea waves reaching about 1 metre and over 1 metre in areas with thunderstorms.

In the southern region (eastern coast), 60% of the area will experience thunderstorms with heavy rainfall in Songkhla, Pattani, Yala, and Narathiwat provinces. Temperatures will range from 23 to 26 degrees Celsius at night to 34 to 35 degrees Celsius during the day. Southwesterly winds will blow at speeds of 15 to 30 kilometres per hour, with sea waves reaching about 1 metre and over 1 metre in areas with thunderstorms.

The southern region (western coast) is also expected to have thunderstorms covering 60% of the area, with heavy rainfall in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun provinces. Temperatures will range from 24 to 25 degrees Celsius at night to 31 to 32 degrees Celsius during the day.

From Ranong province upwards, southwesterly winds will blow at speeds of 15 to 35 kilometres per hour, with sea waves reaching 1 to 2 metres and over 2 metres in areas with thunderstorms. From Phang Nga province downwards, southwesterly winds will blow at speeds of 15 to 30 kilometres per hour, with sea waves reaching about 1 metre and over 1 metre in areas with thunderstorms, reported KhaoSod.

Bangkok and its surrounding areas will see thunderstorms in 60% of the area. Temperatures will range from 25 to 26 degrees Celsius at night to 34 to 35 degrees Celsius during the day, with southwesterly winds blowing at speeds of 10 to 20 kilometres per hour.