Bangkok: The Meteorological Department has announced scattered thunderstorms across Thailand and heavy rain in some areas of the North, Upper Northeast, East, and South. The forecast for the next 24 hours predicts scattered thunderstorms and heavy rain in these regions. Residents are urged to exercise caution due to the potential dangers of heavy and accumulated rain, which may lead to flash floods, forest runoff, and mudslides, particularly on hillsides, near waterways, and in low-lying areas. The prevailing moderate southwest monsoon over the Andaman Sea, Thailand, and the Gulf of Thailand, coupled with a low-pressure cell covering Laos and northern Vietnam, are contributing factors to the current weather conditions.
According to Thai News Agency, waves in the Andaman Sea and the Gulf of Thailand are reported to be moderate. The upper Andaman Sea is experiencing waves approximately 2 meters high, while the lower Andaman Sea and the upper Gulf of Thailand have waves ranging from 1 to 2 meters high. In areas experiencing thunderstorms, the wave height exceeds 2 meters. Sailors navigating the Andaman Sea and the Gulf of Thailand are advised to proceed with caution and avoid areas affected by thunderstorms.
The regional weather forecast for June 25, 2025, indicates thunderstorms in 40% of Bangkok and surrounding areas, with temperatures ranging from a minimum of 26-27 degrees Celsius to a maximum of 32-35 degrees Celsius, and southwesterly winds of 10-20 km/hr. The northern region is expected to experience thunderstorms in 60% of the area with heavy rain in provinces like Mae Hong Son, Chiang Mai, and Chiang Rai. Similar conditions are forecasted for the northeastern, central, eastern, and southern regions, with varying percentages of thunderstorms and specific areas expected to receive heavy rainfall.
In the southern region, both the east and west coasts are facing significant weather challenges, with thunderstorms covering 60-70% of the area and heavy rain anticipated in specific provinces such as Chumphon, Surat Thani, Nakhon Si Thammarat, Ranong, Phang Nga, and Phuket. Wave heights in these coastal areas are expected to reach up to 2 meters or more in the event of thunderstorms, necessitating heightened vigilance from local residents and maritime operators alike.