The Thai Meteorological Department (TMD) on Friday issued a weather advisory warning of heavy to very heavy rain across southern Thailand as the moderate monsoon trough strengthens and moves over the lower South.
At the same time, a moderate northeast monsoon is prevailing over the upper Gulf of Thailand, upper South, and upper Andaman Sea, bringing scattered thundershowers and rough seas.
Residents in southern provinces are advised to beware of heavy rainfall and accumulated water that could lead to flash floods and overflows, particularly in foothill and lowland areas. Travelling through flood-prone zones should be avoided.
Waves in the upper Gulf and upper Andaman Sea are expected to reach 1–2 metres, rising to over 2 metres in areas affected by thundershowers. In the lower Gulf and lower Andaman Sea, waves are forecast to be around 1 metre, also exceeding 2 metres during storms.
Meanwhile, a moderate high-pressure system from China continues to cover upper Thailand, bringing cool mornings to northern regions. Isolated light rain is expected in the North, lower Northeast, and East, with fluctuating temperatures prompting health warnings from the TMD for residents, particularly in the North and Northeast, to stay warm and look after their health amid changing weather conditions.
The weather forecast for the next 24 hours is as follows:
North: Morning cool. Isolated light rains. Minimum temperature 17-23 °C. Maximum temperature 30-33 °C. Cold on the mountain top. Minimum temperature 9-15 °C.
Northeast: Morning cool. Isolated light rains in the lower part. Minimum temperature 18-22 °C. Maximum temperature 29-31 °C. Cool to cold on the mountain top. Minimum temperature 12-16 °C.
Central: Morning cool. Minimum temperature 21-24 °C. Maximum temperature 30-33 °C.
East: Morning cool in the upper part. Isolated light rains mostly in along the coast. Minimum temperature 21-25 °C. Maximum temperature 31-33 °C. Wave height about 1 metre, 1-2 metres offshore and above 2 metres in thundershowers.
South (East Coast): Fairly widespread thundershowers and isolated heavy to very heavy rains in Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, and Narathiwat. Minimum temperature 22-25 °C. Maximum temperature 27-32 °C. Wave height 1-2 metres and above 2 metres in thundershowers.
South (West Coast): Fairly widespread thundershowers and isolated heavy to very heavy rains in Phangnga, Phuket, Krabi, Trang, and Satun. Minimum temperature 23-25 °C. Maximum temperature 28-30 °C. Wave height about 1 metre, 1-2 metres offshore and above 2 metres in thundershowers.
Bangkok Metropolitan: Cloudy. Minimum temperature 24-26 °C. Maximum temperature 32-34 °C.