I can offer the following from my own experience in 9/27/2007:
Please monitor the weather 2 weeks before coming, such as will there be storm dumping lots snow. I DID NOT. On 9/27/2007 the forecast weather was a good sunny day, and I did not bring crampon and ice axe. I also was not aware that there was a storm just a week ago dumping lots snow. When I arrived at the 99 switch backs there were lots snow, and the cable section was not safe to pass without crampons and ice axe. I had to turn around.