Bangkok: The Meteorological Department has issued a forecast indicating that thunderstorms and heavy rain are expected to impact Thailand extensively, with Bangkok and its vicinity experiencing rain in 70% of the area.
According to Thai News Agency, the weather forecast for the next 24 hours predicts that the upper part of Thailand will continue to experience thunderstorms and heavy rain. Residents are advised to exercise caution and avoid traveling through areas with thunderstorms and routes prone to flooding, especially in low-lying areas with insufficient drainage. Such conditions may lead to temporary flooding. The public is also advised to avoid staying in open areas, under large trees, or near unstable structures. Farmers are urged to protect their crops and livestock from potential damage and to take care of their health amid the changing weather conditions. These weather conditions are attributed to a moderate high-pressure area from China, which is affecting the South China Sea and bringing moisture from the Gulf of Thailand and the South China Sea over the upper part of Thailand.
In the southern regions, heavy rainfall is expected in certain areas, increasing the risk of flash floods and forest runoff, particularly in hillside regions near waterways. This is due to moderate southwesterly winds affecting the Andaman Sea, the South, and the Gulf of Thailand. The Andaman Sea is experiencing moderate waves, with heights ranging from 1 to 2 meters, and even higher in areas with thunderstorms. Mariners in the Gulf of Thailand and the Andaman Sea are advised to navigate with caution and avoid areas experiencing thunderstorms.
Regarding dust accumulation, the current weather conditions are resulting in low to moderate levels of dust and smog in the upper part of Thailand, with a potential decrease or stabilization due to ongoing rainfall in several areas.
The regional weather forecast for May 13, 2025, indicates varying chances of thunderstorms across different parts of Thailand. Bangkok and surrounding areas have a 70% chance of thunderstorms, with temperatures ranging between 25-32 degrees Celsius and southeasterly winds of 10-20 km/hr. The northern region will see thunderstorms in 40% of the area, with temperatures between 22-37 degrees Celsius and easterly winds of 5-15 km/hr. The northeastern region is expected to have thunderstorms in 60% of the area, with temperatures from 21-34 degrees Celsius and easterly winds of 10-20 km/hr.
The central region faces a 70% chance of thunderstorms and some heavy rain, with temperatures from 23-34 degrees Celsius and easterly winds of 10-20 km/hr. The eastern region is forecasted to have thunderstorms in 80% of the area, with temperatures between 24-33 degrees Celsius and southeast winds of 15-30 km/hr. In the southern region, both the east and west coasts anticipate thunderstorms in 70% of the area, with temperatures ranging from 23-34 degrees Celsius. Waves in the sea are projected to be around 1 meter high, increasing to over 2 meters in areas with thunderstorms.