Weekly Weather Summary
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October 13, 2017 - October 19, 2017Max. Rainfall AmountMax. Temperature
Thailand
The monsoon trough lay across the lower central, upper southern and eastern parts during the firth half of the period and it lay towards the tropical storm “KHANUN (1720)” in the upper South China Sea during weekend. “KHANUN” intensified into typhoon on 15 Oct. then moved pass southern of Guangdong in China to the Gulf of Tonkin. After that, it was respectively downgraded and finally degenerated into an area of low pressure cell over the Gulf of Tonkin on the next day. The mention monsoon trough shifted southward to lie across upper southern part during last period. Besides, the moderate southwest monsoon which prevailed over the Andaman Sea and southern part was weakened during late period. Moreover, the high pressure area from China extended its ridge to cover northeastern, northern and central parts on the last day of the period. These conditions caused rainfall remained over upper Thailand nearly the whole period. For southern Thailand, rainfall was decreasing science middle period mainly in the west coast.    
Northern Part
Scattered to fairly widespread rain nearly the whole period with heavy to very heavy rainfall in some areas. Flash floods occurred at Chiang Mai province on 17 Oct and also occurred with land-slide at Tak province on 18 Oct. 152.1 mm at Mueang Tak on 17 Oct.  20.7 º C at Chiang Rai Agromet Stn. Chiang Rai on 18 Oct. (11.5 º C at Doi Inthanon ChiangMai on 18 Oct.)  
Northeastern Part
Isolated rain with heavy rainfall in some areas except for scattered to fairly widespread rain with heavy to very heavy rainfall in some areas during 15-17 Oct. Flash floods occurred at Nong Bua Lamphu and Rai Et provinces on 17 Oct. 123.9 mm at Loei Agromet Stn. Loei on 16 Oct.  19.0 º C at Mueang Khon Kaen on 17 Oct. (12.0 º C at Phu Luang Sanctuary Loei on 19 Oct.)  
Central Part
Widespread rain with heavy rainfall in some areas on the first day of the period then isolated to scattered rain with heavy to very heavy rainfall in some areas. Flash flood occurred at Suphanburi on 15 Oct. Floods occureed continuous from last period at Nakhon Sawan, Sing Buri, Phra Nakhon Si Ayutthaya, Ang Thong, Lop Buri and Chai Nat provinces. 97.0 mm at Tha Tako Nakhon Sawan on 17 Oct.  21.9 º C at Mueang Kanchanaburi on 18,19 Oct. 
Eastern Part
Scattered rain with heavy to very heavy rainfall in some areas except for fairly widespread to widespread rain with heavy rainfall in some areas on 13, 17 and 19 Oct. 97.6 mm at Mueang Nakhon Nayok on 16 Oct.  22.5 º C at Khlong Yai Trat on 18 Oct.  
Southern Part (East Coast)
Fairly widespread rain with heavy rainfall in some areas on the first day of the period then isolated to scattered rain with heavy rainfall in some areas. Flash flood and land slide occurred at Chumphon province on 15 Oct. 50.6 mm at Phato Chumphon on 14 Oct.  21.2 º C at Hat Yai Song Khla on 17 Oct. 
Southern Part (West Coast)
Widespread rain with heavy rainfall in some areas during early period then isolated rain. 86.9 mm at Takua Pa Phang-Nga on 14 Oct.  19.6 º C at Nuea Khlong Krabi on 17 Oct. 
Metropolitan
Fairly widespread to widespread rain with heavy to very heavy rainfall in some areas except for isolated to scattered rain with heavy rainfall in some areas on 15- 17 Oct. 215.2 mm at The War Veterans Organization of Thailand Khet Ratchathewi on 13 Oct. ( 97.4 mm at Samut Prakan Agromet.Stn. Samut Prakan on 13 Oct.)   23.2 º C at Bangkok port Khet Klong Toei on 14 Oct. (23.8 º C at Kamphaeng Saen Nakhon Pathom on 19 Oct  
Weekly total Rainfall and Weekly mean minimum temperature Map
Issued Date October 20, 2017