Bangkok: The Meteorological Department has issued a warning for the North, Central, and East regions of Thailand, forecasting heavy rain in some areas, particularly in the provinces of Mae Hong Son, Chiang Mai, and Chiang Rai. Residents in these areas are advised to exercise caution due to the potential dangers posed by heavy and accumulated rainfall. As for Bangkok and its nearby regions, there is a 70% probability of experiencing thunderstorms and heavy rain in certain areas.
According to Thai News Agency, the department's 24-hour weather forecast highlights the risk of flash floods and forest runoff, especially in hillside regions near waterways and low-lying areas. This weather pattern is attributed to a low-pressure system covering the upper parts of Myanmar and Vietnam, accompanied by a moderate southwest monsoon affecting the Andaman Sea, Thailand, and the Gulf of Thailand.
Maritime conditions in the Andaman Sea are expected to be moderate, with waves reaching about 2 meters in the upper Andaman Sea and 1-2 meters in the lower part. In areas experiencing thunderstorms, wave heights may exceed 2 meters. Mariners in both the Andaman Sea and the Gulf of Thailand are advised to proceed with caution and avoid areas with thunderstorms.
Additionally, the tropical depression in the eastern Philippines has intensified into Tropical Storm 'Wipha.' It is projected to traverse the northern Philippines and enter the upper South China Sea between July 19-22, 2025. This development is expected to strengthen the moderate southwest monsoon over the Andaman Sea, Thailand, and the Gulf of Thailand, leading to increased rainfall and heavy to very heavy rain in some regions. The Andaman Sea and the upper Gulf of Thailand are anticipated to experience stronger waves, ranging from 2-3 meters and exceeding 3 meters during thunderstorms.
In Bangkok and its vicinity, thunderstorms are predicted to occur in 70 percent of the area, with some areas experiencing heavy rainfall. Temperatures are expected to range from a minimum of 24-26 degrees Celsius to a maximum of 33-35 degrees Celsius.