Bangkok: The Meteorological Department has issued a warning for residents in the North and Northeast regions of Thailand, forecasting heavy to very heavy rainfall that could lead to flash floods, mudslides, and forest runoff.

According to Thai News Agency, the department predicts that the upper regions will continue to experience severe weather over the next 24 hours, with a monsoon trough passing through these areas along with a moderate southwest monsoon affecting the Andaman Sea, the South, and the Gulf of Thailand.

Communities in these regions are advised to remain vigilant against the dangers posed by the heavy rains, particularly those living near hillsides, waterways, and low-lying areas. Farmers have been urged to enhance drainage systems in their fields to mitigate potential damage to crops and livestock.

Maritime conditions are also affected, with strong waves about 2 meters high in the upper Andaman Sea and 1-2 meters in the lower Andaman Sea. Thunderstorm conditions could increase wave heights to over 2 meters, prompting authorities to advise sailors to exercise caution and avoid areas with thunderstorms. Small boats in the upper Andaman Sea are advised to stay ashore during this period.

Additionally, the Meteorological Department notes a low-pressure cell in the upper Bay of Bengal, expected to intensify and move closer to the coasts of Bangladesh and India by May 29-30, 2025, though it poses no direct threat to Thailand.

The regional weather forecast for May 29, 2025, outlines varying degrees of thunderstorms and rainfall across the country. Bangkok and surrounding areas can expect thunderstorms in 70% of the area, while the Northern and Northeastern regions face the highest risk with heavy to very heavy rain in several provinces. The Central region anticipates thunderstorms in 60% of the area, and the Eastern region foresees heavy rain in 80% of its area. The Southern regions, both east and west coasts, expect thunderstorms in 40% of the area predominantly affecting specific provinces.