The closest thing I had to a premonition was watching the first plane jet down Manhattan, I was actually on a roof across the street from Tower 7.
However, the Sunday before that, September 9th, I had gone fishing with a few friends. We were about 50 miles off the coast of Long Island and the only thing that was visible was the tip of the WTC South and North Towers. We commented on how cool that was, that was about it.
The bank I used to deal with, Atlantic Bank of New York had leased temporary office space at the very top of the North Tower, if you do a search of the tenants of the WTC you will still see the bank as having leased the top floors. They had moved there for a year to build their own 40 story building in midtown manhattan, their lease was expiring the end of September 2001. My ex-g/f was a manager at one of their branches. They were supposed to have a managers meeting on the top floor on that very day.
However the CEO decided on September 1st, since the new building was ready ahead of schedule, to move into their new building. And so they did, the Friday before September 11th.
Lucky Them!