Starting from the early morning of April 27, Yilan Suao, northeastern Taiwan Province, my country, was affected by the continuous rainfall cloud system, and continued heavy rainfall occurred. Judging from the monitoring data, it rained moderately to heavy rain almost every hour on April 27, and in some periods it reached the 55mm heavy rainfall order in one hour. Finally, the total rainfall in Suao on April 27 was fixed at 531.0 mm. It should be noted that the rainfall in my country exceeds 50 mm in 24 hours is a heavy rain, and more than 250 mm is a heavy rain. The heavy rain in Suao has reached more than twice the standard for heavy rain, and the rainfall is extremely terrifying.
Although Taiwan's annual rainfall is very heavy, such rain is relatively rare in April. This amazing rainstorm has broken the station's daily rainfall record in April. The original record was 202.3 mm, which directly doubled the record and is also the third heavy rainfall in the station's history. In addition, on April 2, the eastern coastal area of Taiwan, also encountered common heavy rainstorms and even local heavy rainstorms. Such heavy rainfall is relatively abnormal in April.
April 27 One of the main reasons for this rain in eastern Taiwan is cold air. This cold air travels south along the East China region, which previously brought a local "late spring cold" to Jiangsu, Shandong and other places in my country. After it moved south to Taiwan, it cooperated with the water vapor plundered from the East China Sea to rise in front of Taiwan's central mountain range , causing severe rain.
China Taiwan IslandThe eastern region is one of the areas with the most abundant rainfall in China. There have been terrifying rainstorms with daily rainfall of more than 1,500 mm. However, the rain here is quite unevenly distributed, often in early summer, plum rain 2 seasons and typhoon seasons in summer and autumn are the peak periods of rainfall. The rain in winter and spring is relatively less and gentle. Now such heavy rainstorms suddenly arrive early in late April, which indirectly illustrates the abnormal weather in 2019.
Starting from the fall of 2018, the Pacific Ocean began to turn into a weak El Nino state, which has caused the climate abnormality of in the Pacific region of in the winter and spring of 2019. But in the spring of 2019, weak El Niño not only did not weaken but also had a trend of strengthening and sustaining development, which is very rare in past meteorological history. The U.S. Ocean Atmospheric Administration (NOAA) called it an "unseen" El Niño development model. Due to the abnormal development of El Niño, it is unexpected and reasonable to bring extreme weather. The weather in spring this year is so abnormal, and the weather this summer is probably even more different from the past. Our country should pay more attention to preventing abnormal weather.
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