The Thai Meteorological Department forecasts thunderstorms over 40-60% of the North, western Central, East, South and Bangkok areas from 06:00 today to 06:00 tomorrow, with some heavy rain. Flash floods and landslides are possible near slopes and low-lying areas. For your business: protect stock and equipment at ground level, plan deliveries around flood-prone roads, and keep sea-going crews off routes with thunderstorms; the Andaman and Gulf waves are over 2 m in storm areas.