If you are asking about Nari, no, it had not hit yet. It was a clear, hot night. I remember because I was enjoying the air conditioning at the Internet cafe/game parlor downstairs from my then humble, AC and TV-less abode on Xindian's main street when I saw the news that a plane had hit the WTC. Then went across the street to my friend's place to see the second one hit the other tower on TV -they had cable. No rain, no wind in Taipei yet.
One of our friend's used both 911 and Nari as excuses to stay longer after his visa expired, as there were no flights/there was a bottleneck afterwards/chaos after both. But that was almost October.