Storm Noru has weakened to a low-pressure system but will continue to bring heavy rain on Friday, with the threat of flooding, the Meteorological Department said.
Director-general Chomparee Chompurat said the storm weakened to a strong low-pressure system in the northeastern province of Chaiyaphum about 7pm on Thursday.
The low-pressure system covered the lower North, upper Central Plains and the Northeast on Friday.
Together with the strong monsoon, it would cause heavy rain in parts of the North, the Northeast, the Central Plains, the East and the South for another day. Ms Chomparee said, with runoff and possible flash floods on slopes and low-lying areas.
Small boats should remain ashore in the Andaman Sea and the upper Gulf of Thailand until Saturday.
Persistent rain generated runoff from the Phu Langka mountain range that poured into Muang district of Chaiyaphum about 9pm on Thursday.
Flood levels ranged from 50-80 centimetres in the heart of the province on Thursday night, and had slightly subsided to 50-60cm on Friday morning.
Chaiyaphum was among provinces in the Central Plains, the North and the Northeast where the Department of Disaster Prevention and Mitigation expected runoff and flash floods on Friday.
Other provinces were:
North:
- Chiang Mai
- Lampang
- Lamphun
- Mae Hong Son
- Nan
- Phetchabun
- Phitsanulok
- Sukhothai
- Tak
- Uttaradit
Central Plain:
- Ang Thong
- Ayutthaya
- Chai Nat
- Chanthaburi
- Pathum Thani
- Prachin Buri
- Rayong
- Sa Kaeo
- Saraburi
- Sing Buri
- Trat
Northeast:
- Amnat Charoen
- Buri Ram
- Khon Kaen
- Maha Sarakham
- Nakhon Ratchasima
- Roi Et
- Si Sa Ket
- Surin
- Yasothon
- Ubon Ratchathani
A run-off in Muang district of Chaiyaphum on Thursday night.