Avalanche: Hatcher Pass

Location: 4068

Route & General Observations

Standard approach to 4068, skinned up low angle S/SE ridge. All parties members felt numerous whumpfing. No significant natural avalanche activity noted.

Avalanche Details
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Trigger SkierRemote Trigger0
Avalanche Type Hard SlabAspect South
Elevation 3000ftSlope Angle 28deg
Crown Depth3ftWidth 70ft
Vertical Run 300ft  
Avalanche Details

Skiier was descending low angle slope then rolled over a steeper 25-30 degree convexity. The skiier did not feel or hear any snow movement until coming to a stop approximately 50 feet below the crown and saw the snow moving slowly down the slope. He quickly traversed to safe position as the avalanche gained mass and speed, running to further to the valley floor. No one caught or carried.

Crown profile was not completed, but the crown appeared to vary significantly in thickness from less than 1 foot to at approximately three feet. The avalanche slid to the ground.

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)?Yes
Cracking (Shooting cracks)?No
Observer Comments

Whumpfing. Debris seen on northern aspect on much steeper terrain.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Recent snowfall from the day prior. Mostly sunny, light to no wind.

Snow surface

Settled powder in area of concern. Wind slab pockets on the ridge.


No formal tests conducted. Snowpack structure was noted to be generally poor with storm snow on top of firm crust with facets underneath.

Photos & Video
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