Thailand Meteorological Department Issues Heavy Rain Warning for 36 Provinces

On August 2, 2026, the Thai Meteorological Department issued a weather advisory warning of heavy rainfall across 36 provinces. According to Khaosod Online, this weather pattern is driven by a monsoon trough passing through the upper northern region and Laos, connecting to a low-pressure area near the coast of northern Vietnam. This is further intensified by a moderate southwest monsoon covering the Andaman Sea, Thailand, and the Gulf of Thailand.

Residents and travelers in the affected areas, particularly those near foothills or low-lying regions, are advised to remain cautious of potential flash floods and forest runoff. The northern region is expected to experience the most significant impact, with a 70% chance of thunderstorms and heavy rain in provinces including Mae Hong Son, Chiang Mai, Chiang Rai, Lampang, Phayao, Nan, Tak, Sukhothai, Kamphaeng Phet, Uttaradit, and Phitsanulok.

Marine conditions are also affected; the upper Andaman Sea is seeing waves between 1 and 2 meters, while the lower Andaman Sea and the Gulf of Thailand are experiencing waves of approximately 1 meter. In areas with thunderstorms, wave heights may exceed 2 meters. Mariners are urged to exercise caution and avoid navigating through storm-affected zones. While the forecast covers the 24-hour period ending at 6:00 PM on August 3, 2026, travelers should continue to monitor local updates for any changes in weather severity.