
The Thai Meteorological Department (TMD) has forecast thundershowers across all regions over the next 24 hours, with isolated heavy rain expected in parts of the Central region, including Bangkok and its surrounding areas.
In its forecast issued at 5pm on Saturday (October 31), the department advised residents in affected areas to beware of thundershowers and heavy rain.
The weather conditions are being driven by easterly winds prevailing over the Gulf of Thailand, the country and the Andaman Sea, while the high-pressure system, or cold air mass, from China covering upper Thailand and the South China Sea is weakening.
The department also warned that waves in both the Andaman Sea and the Gulf of Thailand could exceed two metres in areas experiencing thundershowers. Mariners were advised to check their routes, navigate with caution and avoid sailing through stormy areas.
The forecast is valid from 6pm on October 31 until 6pm on Sunday (November 1).
Northern Thailand
Thundershowers are forecast across 20% of the region, mainly in Mae Hong Son, Tak, Kamphaeng Phet, Phichit, Phitsanulok and Phetchabun.
Temperatures are expected to range from 22-26°C at night to 33-36°C during the day, with easterly winds of 10-20km/h.
Northeast
Thundershowers are expected across 30% of the region, mainly in Loei, Chaiyaphum, Maha Sarakham, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani.
Minimum temperatures will range from 23-25°C, while maximum temperatures will reach 33-35°C. Easterly winds are forecast at 10-20km/h.
Central Thailand
Thundershowers are forecast across 40% of the region, with isolated heavy rain in Kanchanaburi, Ratchaburi, Nakhon Pathom, Samut Sakhon and Samut Songkhram.
Temperatures are expected to range from 23-26°C at night to 33-36°C during the day, with southeasterly winds of 10-20km/h.
Eastern Thailand
Thundershowers are expected across 60% of the region, mainly in Nakhon Nayok, Prachin Buri, Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat.
Minimum temperatures will be 24-26°C, with daytime highs of 33-35°C. Southeasterly winds will reach 10-30km/h.
Waves are expected to remain below one metre in general but could rise above two metres in areas experiencing thundershowers.
Southern Thailand (east coast)
Thundershowers are forecast across 40% of the region, mainly in Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Songkhla, Yala and Narathiwat.
Temperatures are expected to range from 22-25°C at night to 32-35°C during the day.
From Surat Thani northwards, easterly winds will reach 15-30km/h. From Nakhon Si Thammarat southwards, southeasterly winds of 15-30km/h are expected.
Seas will have waves of around one metre, rising above two metres in areas experiencing thundershowers.
Southern Thailand (west coast)
Thundershowers are expected across 40% of the region, mainly in Phang Nga, Phuket, Krabi, Trang and Satun.
Minimum temperatures will range from 23-25°C, while maximum temperatures will reach 32-36°C. Southeasterly winds are forecast at 15-35km/h.
Waves will reach around one metre near the coast and one to two metres offshore, rising above two metres in areas experiencing thundershowers.
Bangkok and surrounding areas
Thundershowers are forecast across 60% of Bangkok and its surrounding areas, with isolated heavy rain.
Temperatures are expected to range from 25-27°C at night to 34-36°C during the day, with southeasterly winds of 10-20km/h.