The Meteorological Department forecasts scattered-to-heavy rain across most regions today, with 70% thunderstorm coverage in Bangkok and the north and north-east, and very heavy rain in parts of Chiang Rai, Phayao, Nan, Nong Khai, Udon Thani and Chanthaburi. Flash floods and landslides are possible near streams and low-lying areas. For a Thai SME: plan deliveries and staff travel around the afternoon storms, move stock off low floors, and check drainage at premises. Small boats should not leave shore in the upper Andaman and upper Gulf, and waves of 2-3 m or more are forecast at sea.