I spoke with Tyson this afternoon and he told me of two avalanches his party triggered.  They had skied upper Mill B South for a good portion of the day and were working down to lower elevations.  They expected to find surface hoar as they were getting into the mid elevations and sure enough.  One slide was triggered while skinning confirming the presence of surface hoar.  They then decided it was time to not mess around with any significant slopes.  They skied a conservative line.  The 3rd skier triggered a pocket that also ran on surface hoar.  No one was caught in either slide and they were quite aware of the situation and were trying to mitigate it appropriately.

Kobernik