# Online News

The Uttar Department officially entered the '69 rainy season on May 15, continuing to mid-October, with rainfall less than' 68 and 10 percent lower than the normal average, with rainfall less than a year earlier. This year, 1-2 storms are expected.

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On May 14, 2026, the Director-General of Meteorology, Dr. Sukanyani Yavijanj, officially announced Thailand's entry into the rainy season from May 15, 2026, after detecting that the meteorological component meets Thailand's entry criteria for the rainy season. It consists of upper Thailand with rainfall covering more than 60 percent of the area, lower-level winds changing southwest and upper-level winds changing east. Upper Thailand's rainy season continues until about mid-October, and the southern east will continue to rain until December.

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For this year's rainy season overview, the country's total rainfall is expected to be less than 2025 and about 10 percent lower than the normal average. By mid-May to mid-June, the rainfall will begin to increase and fall more steadily, especially in the eastern and southern western regions where there is a chance of some heavy rainfall.

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Then, in late June to early July, the amount of rain and the distribution of rain can decrease, causing many areas to have a chance of precipitation, especially areas outside the irrigation area, before the rain returns to heavy rainfall again during August to September, which is when heavy rainfall, flash floods, forest water flows, and overflows in many areas.

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Meanwhile, the Meteorological Department closely monitors the El Niño-La Niña or ENSO phenomenon situation, which is currently in a neutral state, but has a trend towards El Niño in the second half of the year, which may result in less than normal rainfall in Thailand and slightly higher than normal temperatures.

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Although overall the amount of rainfall for the year is less likely than usual, periodic heavy rainfall from monsoon influences and low pressure patches are still to be monitored, which can result in flash floods, mixed forest water flows and affect farmland in many areas.

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This year's tropical cyclone outlook is expected to hit Thailand or affect about 1-2 storms, likely between August and September, and may primarily affect the northern and northeastern regions.

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In addition, the Meteorological Department has opened the "Thailand Heavy Rainfall and Strong Wave Tracking Center" to closely monitor, analyze and assess the weather situation. After the period May 14-18, 2026, Thailand is prone to heavy to heavy rainfall in many areas, especially northern, central, eastern and southern regions, from the influence of strong low pressure patches in the Bay of Bengal, coupled with the stronger southwest monsoon.

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At the same time, the Andaman Sea and the Gulf of Thailand will have strong waves. The Andaman Sea has waves of 2-3 meters high and areas with thunderstorms of more than 3 meters high. People in vulnerable areas should be on the lookout for flash floods, wild water flows, especially foothill slopes and low-lying areas. Boaters should be careful to navigate and small boats in the Andaman Sea should abstain from shore during such days.

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The Meteorological Department will monitor the situation and issue warning announcements on an ongoing basis, with public requests to closely monitor weather forecast information and warning announcements from the Meteorological Department throughout this year's rainy season.

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# Department of Utology # Online News