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Thailand's 6 southern provinces on the west coast, are expected to experience heavy rains, from tomorrow until Wednesday.
This is due to the influence of developing Cyclone Amphan in the Bay of Bengal. The storm won't make landfall in Thailand.
The department also warned fishermen and other sailors to navigate the Andaman Sea with extra caution and to avoid thunderstorms which will cause rough seas.
The cyclone is expected to intensify into a very severe storm by the morning of May 18.