The TMD reports that the tropical storm is moving west from Hainan Island in the South China Sea at a speed of 20 kph and will make landfall between northern Vietnam and China tomorrow (July 4). It is predicted that the storm will bring with it torrential rain and strong winds over parts of Thailand, especially in the North, the Northeast, the Central and the East.
According to AccuWeather, Mun may weaken back into a tropical depression over the next 12-24 hours due to interaction with land, but there is a chance that it remains a tropical storm as it emerges from Hainan, China, back into the Tonkin Sea. Heavy rainfall and gusty winds are expected across Hainan through Wednesday before conditions improve by Thursday.
It also listed areas that may be affected by the storm, which include Pattaya and Chonburi
North: Chiang Rai, Phayao, Nan, Phrae, Uttaradit, Phitsanulok, Tak, Sukhothai, and Phetchabun.
North East: Loei, Nong Bua Lam Phu, Nong Khai, Bueng Kan, Udon Thani, Sakhon Nakhon, Nakhon Phanom, Mukdahan, Kalasin, Yasothon, Roi Et, Maha Sarakham, Amnat Charoen, Chaiyaphum, Khon Kaen, Nakhon Ratchasima, Si Sa Ket and Ubon Ratchathani.
Central: Ratchaburi, Kanchanaburi, Uthai Thani, Nakhon Pathom, Nakhon Sawan, Lop Buri and Saraburi.
East: Nakhon Nayok, Prachin Buri, Sa Kaeo, Chachoengsao, Chonburi, Rayong, Chanthaburi and Trat.
South: Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani, Ranong, Phang Nga and Phuket.
North: Chiang Rai, Nan, Phrae, Uttaradit, Phitsanuloke, Tak, Kamphaeng Phet, Phichit and Phetchabun.
North East: Loei, Nong Bua Lamphu, Udon Thani, Nong Khai, Bueng Kan, Sakhon Nakhon, Nakhon Phanom, Mukdahan, Chaiyaphum, Khon Kaen and Kalasin.
Central: Ratchaburi, Kanchanaburi, Uthai Thani, Nakhon Pathom and Suphan Buri.
East: Sa Kaeo, Chonburi, Rayong, Chanthaburi and Trat.
South: Phetchaburi, Prachuap Khiri Khan, Chumphon, Ranong and Phang Nga.
The TMD added that small vessels should not go to sea in either the Andaman Sea or the Gulf of Thailand due to the possible strong southwest monsoon that will bring fresh winds and wave heights of 2-3 meters.