Wu Derong: Weakening Mei-Yu Front and Southwest Monsoon; Hot Summer-Like Weather During Dragon Boat Festival Holiday

(Central News Agency reporter Chang Hsiung-feng, Taipei, June 17) Meteorological expert Wu Derong stated that today the lingering front is weakening, and tomorrow the southwest monsoon will also weaken. From June 19 to 24, high pressure from the Pacific will strengthen, bringing clear and increasingly hot weather resembling summer, with each day hotter than the last. A final front of the plum rain season is expected to approach on the 25th and 26th, requiring ongoing observation.

The Central Weather Administration has issued a high-temperature advisory. Due to the subsidence effect of southwest winds, Foehn winds may occur in Taitung County. Today, Taitung is under a yellow alert, with daytime temperatures expected to exceed 36°C, urging caution.

Wu Derong, adjunct associate professor in the Department of Atmospheric Sciences at National Central University, wrote in the 'Leak the Heavens Classroom' column of the Meteorological Application and Promotion Foundation that the latest European model simulations show today's weakening of the lingering front. Taiwan remains under the influence of the southwest monsoon, with unstable atmospheric conditions leading to convective development in the afternoons. Daytime temperatures will be high when not raining.

The Dragon Boat Festival holiday runs from June 19 to 21. Wu noted that the southwest monsoon will weaken tomorrow, with localized thunderstorms still possible in the afternoons. From June 19 to 24, the Pacific high pressure will strengthen, resulting in clear and hot summer-like weather across the island, with occasional brief afternoon showers in mountainous areas.

Wu mentioned that a final mei-yu front is predicted to approach around June 25–26, bringing weather changes. However, international model simulations vary significantly, requiring continuous monitoring.

Wu also pointed out that a tropical disturbance may develop east of the Philippines around June 20–21. While model forecasts differ, most suggest it will turn northeastward over the sea south of Japan, posing no threat to Taiwan. Uncertainty remains, so continued observation is advised. (Edited by Chang Ya-ching) 1150617

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