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Observations

Region: Hatcher Pass
Location: Skyscraper Near Hatcher Pass
Observer:
Date:

Route & General Observations

Recent human triggered or remotely triggered wet slab avalanche on SE aspect of Skyscraper near Hatcher Pass, i.e. “Nixon’s Nose”. Large enough to bury, injure, or kill a person (D2). Occurred 11:45am. Ran to less than 25 yards from the road.

Avalanche Details

Avalanche details

Trigger SnowboarderAvalanche Type Wet SlabAspect Southeast
Elevation 4300ftSlope AngleunknownCrown Depth 24in
Width 150ftLength 500ft  

Observer Comments

Appears to have been triggered by a smaller wet slab avalanche above.

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?YesCracking (Shooting cracks)?No

Observer Comments

Saw skiers trigger wet loose avalanches on Sunnyside of Hatch. Localized collapsing in two places along Hatch Peak ridgeline.

Weather

Weather

Baking.

Snow Characteristics

Snowpack

Boot pen at 11 am on uptrack along east aspect of Hatch Peak ridgeline was above the knee. Hand pits failed on isolation on moist advanced facets on the ground. Able to easily mash my pole to the ground everywhere.

Forecaster Comments

Forecaster Comments

More information: Wet slab was human triggered at 11:45am by snowboarder. Person reported "barely crust" conditions at the top. Descended down slope, triggered wet loose, continued down slope as snow softened to 6" depth. Got to bottom and looked up to see LARGE slow moving wet slab, large enough to bury, injure, or kill. Likely scenario: small wet loose triggered large wet slab. Don't underestimate the solar heating and rapidly rising temps early in the day on southerly aspects.

Photos & Video

Photos



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