Thai Meteorological Department Issues Advisory for Heavy Rain and Storms Across Thailand

Key summary

The Thai Meteorological Department (TMD) issued Advisory No. 4 at 5am on November 3, 2026, warning of unsettled weather in upper Thailand and heavy to very heavy rain in the South from November 5 to 9. The advisory highlights risks including hail, gusty winds, and flash floods, particularly in southern foothill slopes and low-lying areas. A high-pressure system or cool air mass from China is expected to extend across upper Thailand and the South China Sea, strengthening easterly winds over Thailand and the Gulf of Thailand. Waves in the Andaman Sea and Gulf of Thailand are forecast to exceed 2 metres during thundershowers. The TMD advises mariners to navigate cautiously and the public to avoid open spaces, large trees, and unsecured billboards during the storm period. Specific forecasts for November 3 to 4 indicate thundershowers covering 60% of Bangkok and surrounding areas, with temperatures ranging from 24°C to 36°C. The East region expects thundershowers in 60% of its area, while the North, Northeast, and Central regions face varying percentages of coverage for unsettled conditions.