For about twelve hours on September 9, Hurricane Ivan was a category 5 (the strongest category a hurricane can be). Hurricane Ivan weakened a little bit before it came close to Jamaica on September 10. Ivan strengthened into a category 5 again on September 11 after moving away from Jamaica. At this point Ivan reached its strongest winds, which were at 165 mph. But Ivan again weakened before it moved close to the Grand Cayman Islands on September 12. 