The active high pressure area from China extended its ridge to cover upper Thailand almost the whole week. In addition, the active northeast monsoon prevailed over the southern part and the Gulf of Thailand during the first half of the week. These conditions caused cool and cold weather over upper Thailand especially in the northern and northeastern parts where cold weather was produced continuously, with very cold weather in several areas and frost in some areas. In southern part, cool weather was observed and rainfall was found along the east coast.
During 27-30 Jan, All ships should proceed with caution. All transports should take precaution due to poor visibility through out.