This link might give you some of the information you need:
http://www.esavalanche.org/It really doesn't take much snow-fall to create an avalanche if the conditions are right.
For instance...I was part of a SAR team that recovered the body of a ski instructor at Mammoth Mtn., in Cornice Bowl. It had snowed about 10 inches on a 4 inch hard-pack base, and as he was walking across the top of the bowl, it avalanched, carrying him down slope about 500 feet. We found his dead body, five hours later, under about 3 feet of newly consolidated snow near the bottom of the bowl.
The main trail shouldn't be much of a risk at all, if you follow the switch-backs and avoid the snow-filled chute. If it doesn't snow again in the next week - no problems.
