Thailand is bracing for continued heavy rainfall across several regions, with the Meteorological Department (TMD) issuing a warning for potential flash floods and landslides. A significant monsoon trough positioned over the upper North of Thailand and Laos is the primary driver of this unsettled weather pattern. Compounding this, a moderate southwest monsoon is active across the Andaman Sea, the entirety of Thailand, and the Gulf of Thailand. Residents in vulnerable areas are urged to remain vigilant.
Northern Thailand Faces Significant Rainfall and Flood Threat
The northern region of Thailand is expected to experience the brunt of the heavy rainfall. The TMD forecasts thunderstorms to impact approximately 70% of the North. Specific provinces identified as having a high risk of heavy rain include Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Nan, Tak, and Kamphaeng Phet. These conditions significantly elevate the risk of flash floods and landslides, particularly in areas situated near waterways, in low-lying zones, and along foothills. Temperatures in the North are predicted to range from a low of 22 to 26 degrees Celsius (°C) to a high of 31 to 36°C. Winds will be from the southwest at speeds of 10 to 20 kilometers per hour.
Northeastern and Central Regions Also Under Weather Advisory
The weather advisory extends to the northeastern and central parts of the country. In the Northeast, thunderstorms are anticipated across 70% of the region, with heavy downpours possible in provinces such as Loei, Nong Khai, Bueng Kan, Nong Bua Lamphu, Udon Thani, Sakon Nakhon, and Nakhon Phanom. Daily temperatures are expected to fluctuate between 23-25°C and 30-34°C, with southwest winds blowing at 10 to 20 kilometers per hour.
Central Thailand can anticipate thunderstorms covering 60% of its area. Provinces like Lopburi, Saraburi, Ayutthaya, Kanchanaburi, Ratchaburi, and Nakhon Pathom may experience heavy rainfall. The temperature range for the central region is forecasted to be between 23-26°C for minimums and 33-36°C for maximums. Southwest winds are expected to maintain speeds of 10 to 20 kilometers per hour.
Eastern and Southern Thailand: Rain and Sea Conditions
The eastern provinces are also under a weather watch, with thunderstorms predicted for 60% of the area. Heavy rain is possible in Nakhon Nayok, Rayong, Chanthaburi, and Trat. Temperatures are expected to be between 23-26°C and 32-34°C. Stronger southwest winds of 15 to 30 kilometers per hour are anticipated, leading to sea conditions of approximately 1 meter, potentially rising above 2 meters in areas experiencing thunderstorms.
Along the Southeast coast, thunderstorms are forecast for 40% of the region, primarily affecting Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Yala, and Narathiwat. Minimum temperatures will range from 22-26°C, with highs between 31-35°C. Southwest winds will blow at 15 to 30 kilometers per hour, with waves around 1 meter, increasing to over 2 meters during thunderstorms.
The Southwest coast faces similar conditions, with thunderstorms expected in 40% of the area, including Ranong province, which may see heavy rain. Temperatures will range from 23-25°C to 31-35°C. Wind speeds will vary, with 15 to 35 kilometers per hour expected from Phang Nga northward, leading to waves of 1 to 2 meters. South of Phuket, winds are expected to ease slightly to 15 to 30 kilometers per hour with waves around 1 meter, though these can exceed 2 meters in thunderstorm zones.
Bangkok and Vicinity: Thunderstorm Outlook
The capital city, Bangkok, and its surrounding areas are also included in the weather alert. Thunderstorms are predicted to affect 60% of the metropolitan region, with the possibility of heavy rain in localized spots. Temperatures in Bangkok are forecast to range from 24-26°C at night to 33-35°C during the day. Southwest winds are expected at 10 to 20 kilometers per hour.
Maritime Safety Advisory Issued
In light of the prevailing weather conditions, the TMD has issued a specific advisory for mariners. While wave heights across the Andaman Sea and the Gulf of Thailand are generally easing, they are expected to be between 1 to 2 meters in the upper Andaman Sea and around 1 meter in the lower Andaman Sea and the Gulf of Thailand. However, these wave heights are predicted to exceed 2 meters in areas experiencing thunderstorms. Sailors are strongly advised to exercise caution and to avoid navigating through zones with active thunderstorms to ensure safety.
Conclusion: Preparedness is Key
The current weather forecast highlights a period of significant rainfall and potential hazards across much of Thailand. The Meteorological Department’s warnings underscore the importance of preparedness, especially for communities in flood-prone and landslide-risk areas. Staying informed about local weather developments and heeding official advisories are crucial steps for ensuring safety during this period of unsettled weather.
