I also have serious doubts about this Meteorologic Institute in Thailand,
Still, take it for what you think it is worth:
March 17, 2007 : Last updated 08:58 am (Thai local time)
The Nation
Home > Breakingnews > Northeastern residents warned of tropical, hail storms
Northeastern residents warned of tropical, hail storms
The Meteorological Department warned Saturday that tropical storms and hail storms could start hitting northeastern provinces from Sunday.
The department announced in a press statement that the high pressure mass would move down from China to cover the northern part of Thailand on Sunday, and would lead to tropical storms and hail storms.
The storms would begin in the Northeast and would later expand to eastern, central and northern regions, the department said.
The Nation
