The Meteorological Department Saturday warned residents of the Northeast and other regions to brace themselves for a sharp drop in temperature starting Saturday night.
In its morning daily forecast, the department said a high pressure from China has moved down to cover the Northeast and will later expand to cover the upper Thailand.
The high pressure will lead to a sharp cold spell and a drop of temperature between six to 10 Celsius degrees.
The drop will start in the Northeast and later happen in other regions until Monday.
The mercury drop will follow thundershowers and strong wind.
Its forecast for Sunday and Monday predicted that the North would see the temperature range from 8 to 14 degrees, the Northeast from 8 t 15 degrees, the Central and East from 14 to 18 degrees and Bangkok from 16 to 18 degrees.