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July 22, 2021
Uncategorized

2019年大西洋颶風季明天開始  或接近平均水平

大西洋颶風季從每年6月1日持續至11月30日。國家海洋和大氣管理局預測,今年大西洋颶風季活躍度接近平均水平的概率為40%,高於和低於平均水平的概率各為30%。

據預測,今年大西洋颶風季,或將出現9到15個最大持續風速達每小時39英里以上的命名風暴,其中4到8個可能演化為最大持續風速達每小時74英里以上的颶風,包括2到4個最大持續風速達每小時111英裏以上的三級或三級以上強颶風。該機構預測出現上述情況的概率為70%。

國家海洋和大氣管理局表示,厄爾尼諾現象預計繼續施加影響,並抑制大西洋颶風季的活躍度。與此同時,大西洋和加勒比海高於平均的水溫、以及西非季風增強,則為大西洋颶風季活躍度增加創造了條件。今年的預測基於這上述兩個因素的相互作用。

據統計,每年大西洋颶風季平均出現12個命名風暴,其中6個演化為颶風,包括3個強颶風。2018年大西洋颶風季活躍度略高於平均水平,共出現15個命名風暴,包括8個颶風以及「弗洛倫斯」和「邁克爾」兩個強颶風。它們去年9月和10月先後從北卡羅來納州和佛羅裡達州登陸,帶來風暴潮、狂風、暴雨、洪水等災害,重創東南沿海等地區,造成大量人員傷亡和財產損失。

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