Rainfall Most Pronounced on the 9th; Weather Agency Predicts Increased Rain Across Taiwan from the 12th
Taiwan's Central Weather Administration (CWA) announced that June 9th will be the peak of the current large-scale heavy rain event due to a stationary front and southwesterly winds. While the front will move south on the 10th and 11th, central and southern Taiwan should remain vigilant for heavy rain. Another front is expected to approach on the 12th, increasing rainfall again.
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- 📰 Published: June 9, 2026 at 12:15
- 🔍 Collected: June 9, 2026 at 12:27 (12 min after Published)
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The Central Weather Administration (CWA) stated that due to the influence of a stationary front and southwesterly winds, today (the 9th) is the period with the most significant rainfall during this large-scale heavy rain event. While the front will gradually move south tomorrow (the 10th) and on the 11th, central and southern Taiwan should still be cautious of heavy rain or extremely heavy rain. Starting from the 12th, another front will move in, causing rainfall to increase across all regions.
In response to the "0608 Stationary Front and Southwesterly Flow Heavy Rain Event," the CWA has initiated "Enhanced Operations for Large-Scale or Severe Heavy Rain Events."
CWA forecaster Chu Mei-lin stated at a press conference today that rainfall will be most significant today due to the stationary front and southwesterly winds. Small to medium-scale convective systems are likely to move over land along the frontal zone, leading to short-duration heavy rainfall. Localized heavy rain or extremely heavy rain is expected in areas south of Yunlin County, areas south of Miaoli County, and the mountainous areas of Taitung County. Other areas and Penghu can expect localized heavy rain.
As of 10:30 a.m. today, cumulative rainfall was most significant in Heping District, Taichung City (147 mm) and Xinyu District, Taoyuan City (139 mm).
Chu noted that rainfall in the southern regions is expected to intensify gradually after today, especially in mountainous areas of the south where persistent heavy rain due to orographic effects is a concern. Localized extremely heavy rain or torrential rain is expected in the mountainous areas of Kaohsiung City and Pingtung County.
Chu said that tomorrow (the 10th), the front will gradually move south. Central and southern Taiwan, as well as the Hualien and Taitung areas, should remain cautious of heavy rain or localized extremely heavy rain. Rainfall is expected to ease gradually from tomorrow evening. On the 11th, the front will move to the Bashi Channel. There will be intermittent brief showers or localized thunderstorms across Taiwan, with localized heavy rain still possible in central and southern regions. On the 12th and 13th, another front will move over Taiwan, leading to a further increase in rainfall.
According to the CWA's latest 24-hour rainfall forecast, for plains areas, Miaoli County, Taichung City, Changhua County, Nantou County, Yunlin County, Chiayi County, Tainan City, Kaohsiung City, and Pingtung County are expected to receive the most, ranging from 150 to 250 mm. For mountainous areas, Kaohsiung City and Pingtung County are forecasted to receive 200 to 340 mm, while Taichung City, Nantou County, Yunlin County, and Chiayi County are expected to receive 150 to 300 mm.
For the total rainfall over the next three days (from 00:00 today to 00:00 on the 12th), plains areas in Kaohsiung City, Pingtung County, and the Hengchun Peninsula are expected to receive the most, ranging from 250 to 400 mm. Areas in Miaoli, Taichung, Nantou, Changhua, Yunlin, Chiayi, and Tainan are forecasted to receive 200 to 350 mm. For mountainous areas, Nantou County, Chiayi County, Kaohsiung City, and Pingtung County are expected to receive approximately 300 to 500 mm.
In response to the "0608 Stationary Front and Southwesterly Flow Heavy Rain Event," the CWA has initiated "Enhanced Operations for Large-Scale or Severe Heavy Rain Events."
CWA forecaster Chu Mei-lin stated at a press conference today that rainfall will be most significant today due to the stationary front and southwesterly winds. Small to medium-scale convective systems are likely to move over land along the frontal zone, leading to short-duration heavy rainfall. Localized heavy rain or extremely heavy rain is expected in areas south of Yunlin County, areas south of Miaoli County, and the mountainous areas of Taitung County. Other areas and Penghu can expect localized heavy rain.
As of 10:30 a.m. today, cumulative rainfall was most significant in Heping District, Taichung City (147 mm) and Xinyu District, Taoyuan City (139 mm).
Chu noted that rainfall in the southern regions is expected to intensify gradually after today, especially in mountainous areas of the south where persistent heavy rain due to orographic effects is a concern. Localized extremely heavy rain or torrential rain is expected in the mountainous areas of Kaohsiung City and Pingtung County.
Chu said that tomorrow (the 10th), the front will gradually move south. Central and southern Taiwan, as well as the Hualien and Taitung areas, should remain cautious of heavy rain or localized extremely heavy rain. Rainfall is expected to ease gradually from tomorrow evening. On the 11th, the front will move to the Bashi Channel. There will be intermittent brief showers or localized thunderstorms across Taiwan, with localized heavy rain still possible in central and southern regions. On the 12th and 13th, another front will move over Taiwan, leading to a further increase in rainfall.
According to the CWA's latest 24-hour rainfall forecast, for plains areas, Miaoli County, Taichung City, Changhua County, Nantou County, Yunlin County, Chiayi County, Tainan City, Kaohsiung City, and Pingtung County are expected to receive the most, ranging from 150 to 250 mm. For mountainous areas, Kaohsiung City and Pingtung County are forecasted to receive 200 to 340 mm, while Taichung City, Nantou County, Yunlin County, and Chiayi County are expected to receive 150 to 300 mm.
For the total rainfall over the next three days (from 00:00 today to 00:00 on the 12th), plains areas in Kaohsiung City, Pingtung County, and the Hengchun Peninsula are expected to receive the most, ranging from 250 to 400 mm. Areas in Miaoli, Taichung, Nantou, Changhua, Yunlin, Chiayi, and Tainan are forecasted to receive 200 to 350 mm. For mountainous areas, Nantou County, Chiayi County, Kaohsiung City, and Pingtung County are expected to receive approximately 300 to 500 mm.
FAQ
What is the cause of this heavy rain?
A stationary front and southwesterly winds.
When will the rain be heaviest?
June 9th is the peak of the rainfall.
What is the forecast for the coming days?
Rainfall is expected to increase again from the 12th.