Heavy rainfall expected tomorrow in 27 provinces, warnings issued

The Meteorological Department of Thailand (TMD) forecasted heavy rainfall leading into tomorrow, October 8, affecting 27 provinces, particularly in the southern region, with warnings of potential flooding and flash floods. The northeastern region will experience cool mornings.

The TMD issued a weather forecast for the next 24 hours, highlighting an area of moderate high pressure or cool air mass from China covering the eastern parts of the northern, central, and northeastern regions, as well as the South China Sea.

This weather pattern will result in cooler mornings in the northeastern region and reduced rainfall in the upper parts of Thailand. However, the monsoon trough passing through the central southern region is expected to bring heavy to very heavy rainfall in some areas.

Residents in the southern region are advised to be cautious of the dangers posed by heavy and accumulated rainfall, which may lead to sudden flooding and flash floods, particularly in foothill areas near waterways and low-lying areas. It is also advised to take care of health due to the changing weather conditions.

Warnings have been issued for 11 provinces downstream of the Chao Phraya Dam, urging vigilance against flooding following the dam’s water discharge. Today’s weather brings cold winds to the northeastern region, though 30 provinces are still expected to experience rainfall, with the risk of sudden flooding.

In addition, waves in the Andaman Sea and the Gulf of Thailand are expected to reach about one metre in height, with areas experiencing thunderstorms seeing waves over 2 metres high. Mariners are advised to navigate with caution and avoid sailing in areas with thunderstorms.

Regional updates

In the northern region, thunderstorms are expected in 20% of the area, especially in Mae Hong Son, Chiang Mai, Lamphun, and Tak provinces. The minimum temperature will range between 23 to 25 degrees Celsius (°C), while the maximum will be between 32 to 35°C. Southeastern winds will blow at speeds of 10 to 20 kilometres per hour (km/h).

In the northeastern region, cool mornings with light rain are to be expected in some areas, mainly in the lower parts. The minimum temperature will be between 20 to 24°C, and the maximum will be between 31 to 34°C. Northeastern winds will blow at speeds of 10 to 25 km/h.

In the central regions, thunderstorms are predicted in 10% of the area, particularly in Kanchanaburi, Ratchaburi, Samut Songkhram, and Samut Sakhon provinces. The minimum temperature will range from 21 to 25°C, with the maximum between 32 to 34°C. Southeastern winds will blow at speeds of 10 to 20 km/h.

In the eastern region, thunderstorms are expected in 30% of the area, with heavy rain in some places, especially in Chon Buri, Rayong, Chanthaburi, and Trat provinces. The minimum temperature will range from 23 to 26°C, and the maximum will be between 32 to 35°C. Eastern winds will blow at speeds of 15 to 30 km/h. The sea will have waves about 1 metre high but over 2 metres in areas with thunderstorms.

For the southern region (east coast), thunderstorms are expected in 70% of the area, with heavy to very heavy rain in some places, particularly in Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat provinces.

The minimum temperature will range from 23 to 24°C, and the maximum will be between 30 to 33°C. Variable winds will blow at speeds of 15 to 30 km/h. The sea will have waves about one metre high but over 2 metres in areas with thunderstorms.

Southern storms

In the southern region (west coast), thunderstorms are predicted in 70% of the area, with heavy to very heavy rain in some places, especially in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun provinces.

The minimum temperature will range from 24 to 25°C, and the maximum will be between 30 to 32°C. Variable winds will blow at speeds of 15 to 30 km/h. The sea will have waves about one metre high but over 2 metres in areas with thunderstorms.

For Bangkok and surrounding areas, thunderstorms are expected in 20% of the area. The minimum temperature will range from 25 to 26°C, and the maximum will be between 33 to 34°C. Eastern winds will blow at speeds of 10 to 20 km/h.