Ski patrol triggered two large hard slab avalanches, one in Slushman's Ravine and the other in Mundy's Bowl, by knocking large cornices down on the slope. One was 4' deep, AC-HS-R2-D3-O, ran 1150' vertical. The other was 2.5' deep, AC-HS-R2-D2-O, ran 650' vertical. This was their first control in this area for the season, so the snowpack is similar to backcountry.
Number of slides
Hard slab avalanche
Cornice fall triggered by human or explosive action
c-A controlled or intentional release by the indicated trigger
O - Old snow
Slab Thickness units
Single / Multiple / Red Flag