
Outbreaks of erratic weather will also bring a decrease in temperature, the department said on Friday.
Summer thunderstorms will be likely in much of the Northeast and the East including Bangkok and its vicinity this weekend.
More summer thunderstorms are forecast during March 27-29 in Chiang Mai, Chiang Rai, Lamphun, Uttaradit, Phetchabun, Phitsanulok, Phichit, Kamphaeng Phet, Loei, Nong Bua Lamphu, Nong Khai, Bueng Kan, Chaiyaphum, Nakhon Ratchasima, Buri Ram, Surin, Chon Buri including Pattaya City, Rayong, Lop Buri and Saraburi as well as Bangkok and vicinity.
Outbreaks of isolated heavy rain will be likely in the South, especially in Chumphon, Surat Thani, Nakhon Si Thammarat, Phuket and Phangnga.