Rain reigns: TMD warns 27 provinces, including Bangkok, to brace for heavy rainfall

The Meteorological Department of Thailand (TMD) issued a heavy rainfall warning for 27 provinces, including Bangkok. The southern region is expected to receive significant rainfall, covering 80% of the area, which may lead to sudden flooding and runoff.

A high-pressure system from China is covering the northern region, the northeastern region, and the South China Sea. This system is bringing in moisture from the South China Sea and the Gulf of Thailand, resulting in rainfall in the upper part of Thailand. Citizens in the upper part of Thailand are urged to take care of their health due to the changing weather conditions. Farmers are also advised to prepare for potential damage to agricultural products.

The northeastern monsoon, covering the Gulf of Thailand and the southern region, is moderate. This results in heavy rainfall in some areas of the lower southern region. Sea waves in the lower Gulf of Thailand are moderate with a height of about 2 metres. In areas with thunderstorms, the waves can be more than 2 metres high.

The upper Gulf of Thailand has waves of 1-2 metres high and in areas with thunderstorms, the waves can be more than 2 metres high. The Andaman Sea has waves of about 1 metre high, with waves of 1-2 metres high away from the coast. In areas with thunderstorms, the waves can be more than 2 metres high.

People in the lower southern region are asked to be cautious of heavy rainfall and accumulated rain, which may cause sudden flooding and runoff, especially in areas near mountain slopes, waterways and low-lying areas. Boat operators should navigate with caution and avoid sailing in areas with thunderstorms.

The northern region will have cool weather in the morning with light rain in some areas. The lowest temperature is 18-22 degrees Celsius and the highest temperature is 32-34 degrees Celsius. The mountain tops are cold with a minimum temperature of 9-15 degrees Celsius.

Cool weather

The northeastern region will have cool weather in the morning and light rain in some areas in the lower part of the region. The lowest temperature is 18-23 degrees Celsius and the highest temperature is 31-34 degrees Celsius. The mountain tops are cold with a minimum temperature of 10-15 degrees Celsius.

The central region will have partly cloudy skies with 10% of the area having thunderstorms, mostly in Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Songkhram, and Samut Sakhon provinces. The lowest temperature is 23-26 degrees Celsius and the highest temperature is 32-34 degrees Celsius.

The eastern region will have partly cloudy skies with 20% of the area having thunderstorms, mostly in Prachin Buri, Sa Kaeo, Chon Buri, Rayong, Chanthaburi, and Trat provinces. The lowest temperature is 24-26 degrees Celsius and the highest temperature is 32-34 degrees Celsius. The sea has waves of about 1 metre high and waves of 1–2 metres high away from the coast. In areas with thunderstorms, the waves can be more than 2 metres high.

The southern region (eastern side) will have thunderstorms covering 80% of the area and heavy rainfall in some areas, especially in Prachuap Khiri Khan, Chumphon, Surat Thani, Nakhon Si Thammarat, Pattani, Yala, and Narathiwat provinces. The lowest temperature is 23-26 degrees Celsius and the highest temperature is 28-33 degrees Celsius.

From Surat Thani province upwards, there are northeastern winds with speeds of 15-35 km/h. The sea has waves of 1-2 metres high and in areas with thunderstorms, the waves can be more than 2 metres high. From Nakhon Si Thammarat province downwards, there are eastern winds with speeds of 20-40 km/h. The sea has waves of about 2 metres high and in areas with thunderstorms, the waves can be more than 2 metres high.

The southern region (western side) will have thunderstorms covering 60% of the area and heavy rainfall in some areas, especially in Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun provinces. The lowest temperature is 23-25 degrees Celsius and the highest temperature is 31-32 degrees Celsius. There are eastern winds with speeds of 15-30 km/h. The sea has waves of about 1 metre high and waves of 1-2 metres high away from the coast. In areas with thunderstorms, the waves can be more than 2 metres high.

Bangkok and its vicinity will have partly cloudy skies with 20% of the area having thunderstorms. The lowest temperature is 24-25 degrees Celsius and the highest temperature is 33-35 degrees Celsius. There are northeastern winds with speeds of 10-30 km/h.