Thailand Meteorological Department Issues Warning for Heavy Rain in Southern Region and Unstable Weather in Northern Areas

Key summary

On October 24, 2026, at 17:00, the Thailand Meteorological Department released Announcement No. 3 regarding heavy to very heavy rain in the southern region and unstable weather across northern Thailand, effective from October 24–28, 2026. The announcement warns of continuous rainfall with heavy precipitation in several areas of the south, posing risks of flash floods and mudslides, particularly in low-lying areas, foothills near waterways, and flood-prone zones. From October 25–27, unstable weather including thunderstorms, strong gusts, heavy rain, and lightning is expected to affect northeastern Thailand first, followed by the north, central region (including Bangkok and surrounding areas), and eastern Thailand. High pressure from China will cover northern Thailand and the South China Sea, bringing moist easterly winds from the South China Sea and Gulf of Thailand. The monsoon trough over the south will strengthen. Wave heights exceeding 2 meters are expected in the Andaman Sea and Gulf of Thailand during thunderstorms; vessels are advised to exercise caution. The Department of Airports was instructed by the government to prepare for heavy rain in 10 southern provinces between October 23–26, checking drainage systems, pumps, power backups, and runway conditions. Dr. Seree Supharatthit from Rangsit University noted current rain status updates. The Meteorological Department specifically warned 11 southern provinces, noting a 70% chance of rain in the Andaman coast side.