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Forecasters say no significant rainfall is expected until May as reservoirs dry up

Forecasters say no significant rainfall is expected until May as reservoirs dry up

2023-03-07

Water levels at reservoirs in Southern Taiwan continue falling, with Tsengwen reservoir hitting a low 18% capacity. The Central Weather Bureau says the past three months have been the driest in the last 60 years for areas south of Taoyuan. Meteorologists say they expect the spring season to be drier and warmer than usual, warning that rains may not come until May, with the plum rain season.

The sun shines down, but don’t pack away your winter clothes just yet, as the weather is set to change. From Sunday, windward areas in the north and east will begin to see wet weather. And starting Monday, a cold air front moving south could cause temperatures to drop below 10 degrees in the north.

Wu Wan-hua
CWB forecaster
During this time, we expect lows of 10 degrees in the Matsu Islands. Kinmen, Central Taiwan, Northern Taiwan and the east coast will see lows of 11 to 12 degrees. In other areas of Taiwan they’ll dip to 13 to 14 degrees. In open areas in the coast, or near mountains it could be even colder.

Water remains scarce in Southern Taiwan, with Chiayi’s Tsengwen Reservoir dipping to 18.1% capacity. According to the CWB, the three months from December to February have been the driest in Taiwan in 60 years for areas south of Taoyuan. If starting the period in June that’s the fourth driest period in 70 years. The weather stations at Sun Moon Lake, Alishan, Chiayi and Tainan have all recorded the fewest rainy days since they were installed. There’s been so little rainfall some are calling it the drought of the century.

Chen Yi-liang
Central Weather Bureau
We often have to wait until the plum rains to get any significant rainfall in Central and Southern Taiwan. From our previous records, there is a high likelihood of scarce to normal rainfall in March and April. Whether the plum rain season will start in May is something that’s somewhat more uncertain. We’ll continue looking at the data and offer an explanation.

The CWB says it expects the spring months to be drier and warmer than usual, adding that the rains may not come back until May.

曾文水庫蓄水率18.1% 氣象局:恐等5月梅雨緩解

2023-03-07

中南部旱象難解,曾文水庫蓄水率已經掉到18.1%,氣象局表示,今年新竹以南冬季降雨,創下60年以來最少,累積雨量甚至少到和百年大旱差不多,接下來春季展望,雨量還是偏少,氣溫正常到偏高,恐怕要等到五月梅雨,才有機會稍稍解渴。

雖然太陽高掛,不過,冬衣、冬被還是不能收,因為又要變天了,週日迎風面的北部、東半部,水氣開始增加,緊接著下週一,冷空氣南下,強度有機會逼近強烈冷氣團,北台灣可能下探10度以下。

[[中央氣象局簡任技正 伍婉華]]
“這段時間內的低溫,馬祖預估是10度,金門、中部以北、東北部11-12度,其他地方13-14度,沿海空曠地區、近山區平地,還會再冷一些些”

南部水庫也持續拉警報,曾文水庫蓄水率已經掉到18.1%。氣象局統計,今年新竹以南冬季降雨,創下60年以來最少。如果從去年六月開始算,更是70年以來第4少。日月潭、阿里山,嘉義、台南,也都創下設站以來最少雨日,累積雨量少到跟百年大旱差不多。

[[氣象局預報中心副主任 陳怡良]]
“中南部地區要有顯著降雨,通常要等到梅雨季,目前預測資料來看,三月、四月份似乎少雨到正常這個機率比較高,至於五月份已經進入梅雨季,這個部分預測不確定性比較大,我們後續會依據最新資料跟大家說明”

氣象局預測,今年春季雨量偏少、氣溫正常到偏高,想解除乾旱,恐怕要等到五月梅雨季。

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