Human triggered wet slab occured at 11:45am. Person skied slope, triggered wet-loose, got to bottom and then saw a large wet-slab occur. No one was caught, carried , or injured. Barely crust conditions at the top. Person said the snow did not "feel mushy" or "too soft" while descending down slope, maybe penetrating 6". Did Not observe collapsing, cracking, or whumping on slope prior to avalanching.
Avalanche: Hatcher Pass
Location: South facing chute on Skyscraper
South side shoulder skyscraper
Forecaster Comments
| Trigger | Snowboarder | Remote Trigger | 0 |
| Avalanche Type | Wet Slab | Aspect | South |
| Elevation | 4200ft | Slope Angle | 34deg |
| Crown Depth | 24in | Width | 30ft |
| Vertical Run | 500ft |
Avalanche Details
At 1145 I kicked off some wet loose which triggered a failure that ran to the ground. The slide ran about 30 seconds after I stopped further down the apron. Definitely didn't see anything chasing me on the ride down. Didn't feel anything funky. Guessing slow moving roller balls/sluff finally sat on a weak spot and triggered a persistent layer?? The failure point was planar above a convexity.
Observer Comments
Boots broke through the crust and went about 6 inches. Snow was just turning wet. No roller balls or other releases that looked fresh.
Weather
Sunny light breeze
Snow surface
Transitioning from freeze crust to wet
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