Thailand is set to experience widespread thunderstorms and a noticeable drop in temperatures across several regions as a high-pressure system from China extends over the upper part of the country, according to the national meteorological authorities.

Forecasters reported that northern and northeastern provinces are likely to see isolated to scattered thunderstorms accompanied by strong winds and occasional lightning.

Temperatures in these areas are expected to fall by several degrees Celsius, bringing cooler morning conditions, particularly in elevated and mountainous districts.

In central and eastern regions, including parts of the Bangkok metropolitan area, residents have been advised to prepare for unstable weather, with short but intense downpours and gusty conditions possible in the coming days.

Authorities have cautioned farmers and outdoor workers to secure property and monitor official updates as weather patterns shift.

Southern provinces, especially along the Gulf of Thailand, may also experience thundershowers influenced by prevailing monsoon winds.

Maritime authorities have urged small boats to proceed with caution due to stronger waves in areas affected by storms.

The changing weather pattern follows the seasonal transition period, when interactions between cooler air masses from the north and warmer, moisture-laden air over Thailand frequently trigger convective activity.

Officials have encouraged the public to remain vigilant for sudden weather developments and to follow safety guidance issued by local administrations.

Emergency services and disaster prevention units are on standby in vulnerable districts to respond to potential flash flooding, fallen trees or localized disruptions.

Meteorologists said conditions are expected to stabilize gradually once the high-pressure system weakens, but intermittent storms could persist in some areas during the transitional phase.