Avalanche: Hatcher Pass

Location: Rae Wallace

Date:
Observer:
Route & General Observations

Skied Rae Wallace laps all day. Triggered slab avalanches on every lap. Slides ranged in size from 20′ wide X 0.5′ deep X 50′ long to 100′ wide X 1.0′ deep X 400′ long. Two of the slides had crowns up to 1.5′ deep. One slide (20′ X 0.5′ X 50′) was triggered on the Rae Wallace up-track chute from below by the third person in line and went across the skin track. Two of the slides broke above skiers. The two largest slides (both 100′ X 1.0′ X 500′) were triggered consecutively a couple turns apart while skiing directionally across the slope away from the first slide. I was briefly caught and carried by an 1.5′ deep slide that broke above me while skiing thru an steep pocket, but was able to dive thru the avalanche and arrest on the bed surface – no harm caused.

Contact, Location & General Observations
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Forecaster Comments

*** We suspect that Buried Surface Hoar is the weak layer culprit for all these avalanches

Avalanche Details
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Trigger SkierAvalanche Type Soft Slab
Aspect North NorthwestElevation 4300ft
Slope Angle 38degCrown Depth 12in
Width 100ftVertical Run 500ft
Near Miss / Accident Details
Number Caught/Carried? 1Number Partially Buried?0
Number Fully Buried?0Number Injured?0
Number Fatalities?0  
Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Lots of human triggered avalanches.