Heavy rain and flash floods expected as storm Trami intensifies

The Thai Meteorological Department (TMD) issued a warning about the intensifying tropical storm Trami, which is expected to bring heavy rainfall to lower northern, central, eastern, and upper southern regions, including Bangkok and its vicinity. Residents are advised to be cautious of flash floods and forest runoffs.

The TMD predicts that the monsoon trough will move across the lower central, upper southern, and eastern regions. Coupled with easterly and southeasterly winds bringing moisture from the South China Sea and the Gulf of Thailand, this will lead to heavy rains in the lower northern, central, and eastern regions, as well as in Bangkok and its surrounding areas.

People in these regions should be vigilant against heavy rain and accumulated rainfall, which may cause sudden floods and forest runoffs, particularly in foothill areas near waterways and low-lying regions. Additionally, residents are advised to take care of their health due to changing weather conditions.

Moderate sea waves are expected in the Andaman Sea and the Gulf of Thailand, with waves reaching 1 to 2 metres in the Andaman Sea and about 1 metre in the Gulf of Thailand. In areas with thunderstorms, waves may exceed 2 metres. Mariners in these areas should exercise caution and avoid sailing in regions with thunderstorms.

The tropical depression east of the Philippines has strengthened into tropical storm Trami and is expected to move into the upper South China Sea in the next couple of days.

The northern region will experience thunderstorms in 60% of the area, with heavy rain in some places, particularly in Mae Hong Son, Tak, and Kamphaeng Phet provinces. The lowest temperatures will range from 22°C to 24°C, while the highest will be between 31°C and 33°C. Easterly winds will blow at speeds of 10 to 15 kilometres per hour.

The northeastern region will see thunderstorms covering 40% of the area, mostly in Nakhon Phanom, Sakon Nakhon, Mukdahan, Yasothon, Amnat Charoen, Nakhon Ratchasima, Buriram, Surin, Sisaket, and Ubon Ratchathani provinces. Temperatures will range from 23°C to 24°C at the lowest to 32°C to 33°C at the highest, with easterly winds at 10 to 20 kilometres per hour.

Storm Trami

In the central region, 60% of the area will experience thunderstorms, with heavy rain expected in Kanchanaburi, Ratchaburi, Phra Nakhon Si Ayutthaya, Nakhon Pathom, Samut Sakhon, and Samut Songkhram provinces. Temperatures will range from 24°C to 26°C at the lowest to 32°C to 34°C at the highest, with easterly winds at 10 to 20 kilometres per hour.

The eastern region will have thunderstorms in 60% of the area, with heavy rain in some places, notably in Nakhon Nayok, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi, and Trat provinces. Temperatures will range from 24°C to 26°C at the lowest to 32°C to 34°C at the highest, with variable winds blowing at 15 to 30 kilometres per hour. The sea will have waves about 1 metre high, and in areas with thunderstorms, waves may exceed 2 metres.

The southern region (east coast) will experience thunderstorms in 40% of the area, with heavy rain in Phetchaburi and Prachuap Khiri Khan provinces. The lowest temperatures will be between 23 and 26°C, and the highest will range from 31 to 34°C. Variable winds will blow at speeds of 15 to 30 kilometres per hour, with sea waves about 1 metre high, and over 2 metres in areas with thunderstorms.

The southern region (west coast) will see thunderstorms in 20% of the area, mostly in Ranong and Phang Nga provinces. Temperatures will range from 23 to 26°C at the lowest to 32 to 34°C at the highest.

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

Bangkok and its vicinity will have thunderstorms in 70% of the area, with heavy rain in some places. Temperatures will range from 25 to 26°C at the lowest to 33 to 34°C at the highest, with easterly winds at 10 to 20 kilometres per hour.