The rather strong high pressure will shift down from Laos and upper Vietnam to the Northeast and the North by 6 April and cover all upper Thailand by 7 April. Outbreaks of summer storms, thunderbolt, gusty winds, hail and downpours are forecast for the North, the Northeast, the Central including Bangkok and its vicinity, and the East. On 7 April, a decrease of rain will be likely in the Northeast and the East while the western part of the North and Central, as well as Bangkok and its vicinity still see continuous thundery rain. The upper South will have more rain.
People in upper country should stay safe from severe weather. Keep off unsecured building and outdoor and beware of crop damage. Affected areas are as following:
6 April 2018
North: Mae Hong Son, Chiang Mai, Chiang Rai, Phayao, Phrae, Nan, Lamphun, Lampang, Tak, Sukhothai, Uttaradit, Phitsanulok, Kamphangphet, Phitchit, and Phetchabun.
Northeast: Loei, Nong Bua Lamphu, Nong Khai, Udon Thani, Bueng Kan, Sakon Nakhon, Nakhon Phanom, Mukdahan, Khon Kaen, Maha Sarakham, Kalasin, Roi Et, Chaiyaphum, Nakhon Ratchasima,
Buri Ram, Surin, Si Sa Ket, Yasothon, Amnat Charoen and Ubon Ratchathani.
East: Nakhon Nayok, Prachin Buri, Sa Kaeo, Chachoengsao, Chon Buri, Rayong, Chanthaburi and Trat.
Central: Ratchabur, Kanchanburi, Nakhon Sawan, Lop Buri, Saraburi, Chai Nat, Sing Buri, Ang Thong,
and Phra Nakhon Si Ayutthaya, including Bangkok and its vicinity.
7 April 2018
North: Mae Hong Son, Chiang Mai, Lamphun, Lampang, Sukhothai, Kamphangphet and Tak.
East: Chon Buri, Rayong, Chanthaburi and Trat.
Central: Ratchaburi, Kanchanaburi, Uthai Thani, Suphan Buri, Samut Songkhram, Samut Sakhon including Bangkok and its vicinity.
South Phetchaburi, Prachuap Khiri Khan, Chumphon, Surat Thani and Nakhon Si Thammarat.
During 7-9 April, the easterly winds across the Gulf will intensify with more rain and isolated downpours expected in the South. The wind waves in the Gulf and the Andaman becomes strong with 2-3 meters high. All ships in both seas should proceed with caution, and small boats in the Gulf keep ashore.
The advisory is effect on 6 April 2018, at 5.00 p.m.
The next issue will be at 6 April 2018, at 11.00 p.m.
(Signed) Wanchai Sakudomchai
(Mr. Wanchai Sakudomchai)
Thai Meteorological Department
Article source: http://www.tmd.go.th/en/warningwindow.php?wID=6942