Thailand
02 December 2020 - 08 December 2020The moderate high pressure area from China extended its ridge to cover upper Thailand then the another moderate high pressure area from China extended its ridge to dominate upper Thailand and the South China Sea during the second half of the period. In addition, the easterly and southeasterly winds prevailed over upper Thailand mid and late period. These conditions caused cool weather in most areas of the northern and northeastern parts. Unusual rainfall was found in some areas in upper Thailand for few days. For southern part, the monsoon trough lay across lower southern part. It lay toward the active low pressure cell over lower South China Sea on 2 Dec. which later moved to cover the coast of Malaysia and lower southern part on 3-4 Dec. then moved to cover lower the Andaman Sea on 5 Dec. Moreover, the low pressure cell covered the coast of Malaysia on the last day of the period associated with the rather active northeast monsoon prevailed over the Gulf of Thailand and southern part during the first half of the period then was weakened. Besides, the southeasterly wind prevailed over the mentioned areas on 5-7 Dec. These caused plentiful rainfall throughout the period especially along the east coast.
Region Weather Summary
02 December 2020 - 08 December 2020Northern
Cool weather nearly the whole areas. Cold weather over the mountain areas and mountain tops. Isolated rain on 2 and 5 Dec.
| Max Rain | Max. Temp. | Min. Temp. |
| 25.0 mm at Chiang Saen Post Office Chiang Rai on 2 Dec. | 16.8 º C at Umphang Tak on 7 Dec. (8.0 º C at Doi Inthanon, Chom Thong Chiang Mai on 2-8 Dec. and at Kiew Mae Pan, Doi Inthanon Chiang Mai on 4 Dec.) |
Northeastern
Cool weather nearly the whole areas during early and mid-period then decreasing in temperature to cool weather in general and cold weather in some areas in Nakhon Phanom province on 7 Dec. Cold weather over the mountain areas and mountain tops. Isolated rain on 3, 5 and 6 Dec. Flooding continued from last period in Ubon Ratchathani province.
| Max Rain | Max. Temp. | Min. Temp. |
| 32.1 mm at Na Chaluai Ubon Ratchathani on 3 Dec. | 15.5 º C at Nakhon Phanom Agromet. Stn., Mueang Nakhon Phanom on 7 Dec. (12.0 º C at Phu Luang Wildlife Sanctuary, Phu Ruea Loei on 2,3,5,6,8 Dec.) |
Central
Cool weather in several areas almost the period. Isolated rain mainly during early and mid-period. Flooding was reported in Suphan Buri province on 2-4 Dec.
| Max Rain | Max. Temp. | Min. Temp. |
| 20.0 mm at Bang Pahan Phra Nakhon Si Ayutthaya on 3 Dec. | 20.7 º C at Thong Pha Phum Kanchanaburi on 8 Dec. |
Eastern
Cool weather in some areas in upper part for few days. Isolated to scattered rain almost the period.
| Max Rain | Max. Temp. | Min. Temp. |
| 10.5 mm at Pong Nam Ron Chanthaburi on 2 Dec. | 21.8 º C at Sanam Chai Khet Chachoengsao on 3 Dec. (16.3 º C at Khao Kheow, Mueang Nakhon Nayok on 3 Dec.) |
Southern (East Coast)
Cool weather in some areas for few days. Fairly widespread rain with heavy to very heavy rainfall in some areas almost the period especially heavy to very heavy rainfall in several areas on the last day of the period. Flooding was reported in Nakhon Si Thammarat province on 3-6 Dec., Surat Thani province on 4-6 Dec., Prachuap Khiri Khan and Phatthalung provinces on 5 Dec., Chumphon province on 5-7 Dec. and Songkhla province on 8 Dec. Gusty wind occurred in Surat Thani province on 3 Dec. Landslide occurred in Phatthalung province on 7 Dec.
| Max Rain | Max. Temp. | Min. Temp. |
| 200.0 mm at Tha Chana Surat Thani on 4 Dec. | 22.5 º C at Mueang Nakhon Si Thammarat on 2 Dec. |
Southern (West Coast)
Fairly widespread rain except for scattered rain on 6-7 Dec. Heavy rainfall was found in some areas on 2, 5 and 6 Dec. Flooding was reported in Ranong province on 5 Dec.
| Max Rain | Max. Temp. | Min. Temp. |
| 61.4 mm at Pak Jan Self-Help Settlement, Kra Buri Ranong on 5 Dec. | 23.0 º C at Takua Pa Phang-nga on 7 Dec. |
Bangkok Metropolitan
Cool weather in some areas of Nakhon Pathom province on the last day of the period. Isolated to scattered light rain on 4, 5, 7 and 8 Dec.
| Max Rain | Max. Temp. | Min. Temp. |
| 6.8 mm at Ban Lat Phrao School Khet Chatuchak on 5 Dec. (3.4 mm at Wat Khemaphirataram School Nonthaburi on 5 Dec.) | 23.9 º C at Don Muang Airport Khet Don Muang on 6 Dec. (22.5 º C at Kamphaeng Saen Nakhon Pathom on 8 Dec.) |
Announcement Date 09 December 2022 10:55