After a ten-day "warm-up," Nari teamed up with the northeastern monsoon to gather up vast quantities of moisture, which it began to dump on Taiwan from the evening of 16 September. The torrential rainfall broke single-day precipitation records in Taipei, Hsinchu, Chiayi and elsewhere. This unremitting deluge battered Taiwan from end to end.
在歷經十天「醞釀」後，納莉與東北季風相互作用，形成「共伴環流」，累積了無數水氣，從十六日夜間開始傾盆而下，各地雨量驚人，分別打破台北、新竹、嘉義等地有紀錄以來的單日降雨量。