Avalanche: Hatcher Pass

Location: West Side of HPMA: South Face of Bullion Mountain

Date:
Observer:
Route & General Observations

Observed slides on the south face of Bullion Mountain in the area of snowmachine activity as we skinned up the the $1000 Run below the north face of Hatch Peak

Contact, Location & General Observations
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Forecaster Comments

Upon closer inspection the avalanches in this observation on Bullion Mountain have been edited by forecasters to D1.5 - 2 in destructive size. Their depth is approximately 6"-2 feet deep in relatively small portions of specific, wind load and cross-loaded terrain.

Avalanches continue to be possible to human trigger throughout the Hatcher Pass region. They are stubborn to unreactive. In many cases it takes numerous riders to get a slope to release and propagation can be limited due to low continuity of the slabs. In isolated areas, on heavily wind loaded areas, on lee slopes where the depth and distribution of wind loaded snow is larger, avalanches may still be possible to trigger that are D2 and 2-4 feet deep.

Avalanche Details
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Trigger UnknownAvalanche Type Soft Slab
Aspect SouthElevation 4100ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
Avalanche Details

Two avalanches of significant size and destructive capability (R2, D1.5-2) observed on the south face of Bullion Mountain (~4100') from Hatch Peak. Snowmachine highmarking observed in the area of these two slides.

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

On the $1000 Run, no obvious signs of instability.

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

Clear skies. Temperature 18F and light winds as recorded at Marmot Wx station

Snow surface

At top of $1000 Run, wind hammered surface; lower on the descent, we found several inches of recycled powder on a uniform crust.

Photos & Video
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