Weekly Weather Summary
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December 7, 2018 - December 13, 2018Max. Rainfall AmountMax. Temperature
Thailand
The rather active high pressure area from China extended its ridge to cover the northern part, northeastern part and the South China Sea during the first half of the period then the mention high pressure area had strengthened. In addition, the southeasterly wind prevailed over upper Thailand and the westerly trough moved through the northern part during the first half of the period. Besides, the moderate northeast monsoon which prevailed over the southern part and the Gulf of Thailand was strengthened during the first half of the period. These conditions caused increasing rain over upper Thailand with heavy rainfall in some areas during the early of the period, then decreasing in temperature in all region accompanied with light to moderate rain occurred in some areas. For the southern part, abundant rainfall was observed throughout the period with heavy to very heavy rainfall in some areas mainly along the east coast.    
Northern Part
Cool weather nearly the whole areas with cold weather in some areas. Cold to very cold weather in mountainous areas and mountain tops. Isolated rain except for scattered to fairly widespread rain on 8 and 12 Dec. 24.7 mm at Chiang Dao Chaing Mai on 12 Dec.  14.7 º C at Thung Chang Nan on 9 Dec. (7.0 º C at Kew Mae Pan, Chom Thong Chiang Mai on 7 Dec.)  
Northeastern Part
Cool weather in several areas during the first half of the period then decreasing in temperature with general cool weather and cold weather in some areas on the last day of the period. Cold weather in mountainous areas and mountaintop. Scattered rain with heavy rainfall in some areas during the early of the period then isolate rain. 48.2 mm at Sirindhorn Ubon Ratchathani on 7 Dec.  14.5 º C at Sakon Nakhon Agromet Stn. Sakon Nakhon on 13 Dec. (11.0 º C at Phu Luang Wildlife Sanctuary Loei on 13 Dec.)  
Central Part
Cool weather in some areas in the upper portion during early and the middle of the period then decreasing in temperature with cool weather almost the whole areas. Fairly widespread rain with heavy rainfall in some areas during the early of the period then isolated rain. 42.8 mm at Phanom Thuan Post Office Kanchanaburi on 7 Dec.  20.3 º C at Mueang Samut Songkhram on 13 Dec. 
Eastern Part
Cool weather in some areas in the upper portion during early and the middle of the period then decreasing in temperature until cool weather several areas. Fairly widespread rain during the early of the period then isolated rain. 41.1 mm at Khao Chakan Sa Kaeo on 7 Dec.  20.0 º C at Sanam Chai Khet Chachoengsao on 12 Dec. 
Southern Part (East Coast)
Cool weather in some areas. Fairly widespread rain with heavy to very heavy rainfall in some areas. Flash flood occurred at Nakhon Si Thammarat province on 9 Dec. 200.0 mm at Pak Phanang Nakhon Si Thammarat on 8 Dec.  21.4 º C at Nong Phlub Agromet Stn. Prachuap Khiri Khan on 9 Dec. 
Southern Part (West Coast)
Cool weather in some areas during the middle of the period. Scattered to fairly widespread rain with heavy rainfall in some areas except for isolated rain on 7, 9 and 12 Dec. 57.4 mm at Kuan Don Satun on 10 Dec.  22.4 º C at Mueang Ranong on 11 Dec. 
Metropolitan
Cool weather in some areas during late of the period. Fairly widespread rain with heavy rainfall in some areas during the early of the period then isolate to scattered rain. 26.3 mm at Bangkok Metropolis Khet Khlong Toei on 7 Dec. Vicinity 38.7 mm at Kampheang Saen Nakhon Pathom on 7 Dec.   22.2 º C at Don Mueang Airport Khet Don Mueang on 13 Dec. Vicinity (20.5 º C at Kamphaeng Saen Nakhon Pathom on 8,13 Dec. 
Weekly total Rainfall and Weekly mean minimum temperature Map
Issued Date December 14, 2018