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  General Situation    at 22:00 January 21, 2021  
The weak high-pressure system covers upper Thailand with a decrease in temperatures by 1-3 °C. Also, it has morning fog and isolated thick patches over the area. There remains cool to cold weather while cold to very cold covers mountaintops with isolated frost likely. All transports take caution due to the poor visibility. In addition, the weak northeast monsoon prevails over the Gulf and the South.
  Bangkok Metropolis and Vicinity Forecast    From 23:00 today To 23:00 tomorrow  
Cool with morning fog and isolated thick patches. 1-3 °C rise in temperature. Minimum temperature 19-21 °C. Maximum temperature 32-33 °C. Northeasterly winds 10-20 km/hr.
More Details Issued Date January 21, 2021
  7 days Weather Forecast   January 21, 2021 - January 27, 2021  
     During 21 - 24 January, the high pressure cover upper Thailand will weakening, 2-4°C rise in temperature and morning fog is likely over upper Thailand. The northeast monsoon prevails over the Gulf and the South will weakening. The wind and waves over the Gulf of Thailand will weakening. During 25 - 27 January, another rather strong high pressure from China will extend to cover South China Sea. The moderated northeast monsoon prevails over the Gulf and the South. The wind and waves over the Gulf of Thailand will strengthen, about 2 meters in the lower Gulf.
     
Cautions
     During 21 - 24 January, people over upper Thailand should beware of poor visibility.
Issued Date January 21, 2021
  7 day Weather Summary   January 11, 2021 - January 17, 2021  
The active high pressure area from China extended its ridge to cover upper Thailand during the beginning of the week and later weakened then another rather active high pressure area from China extended its ridge to cover the mentioned areas on the last day of the week. These conditions caused cool to cold weather in most regions of Thailand almost the week especially very cold weather in some areas of the northern and northeastern parts on 12-13 Jan. For the southern part, with the prevailing of the active northeast monsoon over the Gulf of Thailand and the southern part during the first half of the week caused abundant rainfall during the mentioned time then rainfall has decreased.
Previous Issued Date January 18, 2021