Tropical depression Bualoi was downgraded to an active low-pressure cell over Luang Namtha province of Laos at 1am Tuesday but will still cause heavy rain in some provinces of Thailand on Tuesday, according to the Meteorological Department.
Sugunyanee Yavinchan, director-general of the department, said heavy rain was likely as Bualoi strengthened the southwestern monsoon and the monsoon trough over upper Myanmar and the upper North of Thailand.
She advised small boats in the upper Andaman Sea to be kept ashore on Tuesday.