Avalanche: Hatcher Pass

Location: (1) MicroDot (3904'), SE aspect, and (2) Rae-Wallace Bowl (3520'), terminal moraine.

Route & General Observations

Toured from Independence Bowl PL up into Rae-Wallace bowl and SE aspect of MicroDot.

Avalanche Details
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Trigger SkierRemote Trigger0
Avalanche Type Soft SlabAspect Southwest
Elevation 3600ftSlope Angle 35deg
Crown Depth 16inWidth 40ft
Vertical Run 100ft  
Avalanche Details

A set of three slides, all triggered remotely from above by a skier traversing along the top of the terminal moraine: SS-ASr-R3-D1.5-G x3.

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)?Yes
Observer Comments

Slides from Thursday/Friday (12/29-30/16) storm are evident. As mentioned above, whumphing and shooting cracks.

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

Thin ovcst skies, light wind, no precip.

Snow surface

Tour traversed wind-affected snow with thin crust in places. Evidence of light wind-sculpting.


HS=45cm. Pit dug on 28 degree slope, 3904' eleva, SE aspect of MicroDot. 45-35 cm, 4F wind fragmented new snow; 35-34.5 cm, ice crust; 34.5-15 cm, F wind-packed rounds; 15-0 cm, 1F melt-freeze old facets. Tests: CT7Q2 at 34.5 cm (Q1) on top of ice crust and at 15 cm (Q2) on top of frozen basal facets; ECTN14 on top of basal facets at 15 cm.

Photos & Video
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