In its daily forecast for the next 24 hours issued at 6am on Thursday, the department said the minimum temperature on mountaintops in the Northeast could be around 11 to 16 degrees Celsius. 
The department explained that a strong high pressure is now covering the Northeast and it will extend to upper Thailand by Thursday. 
This will result in cool to cold and windy spells with temperature falling by 2-6 degrees Celsius in the Northeast and by 2-4 degrees Celsius in the North, Central, East, as well as Bangkok and its vicinity. 
It said the minimum temperature on northern mountaintops would range from 9 to 16 degrees Celsius.

Temperature dips sharply in Northeast

The Meteorological Department has forecast that temperature in the Thailand’s Northeast would drop by two to six degrees Celsius on Thursday.