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Avalanche: Summit

Location: Tenderfoot

Date:
Observer:
Route & General Observations

Skinned up tenderfoot ridge skied the front side trees, lots of tracks down from tree line, no tracks at upper elevations, lots of “fat” places that looked like could be problem wind slabs.

Avalanche Details
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Trigger SkierAvalanche Type0
Aspect NorthElevation 1000ft
Slope Angle 35degCrown Depth 18in
Width 15ftVertical Run 40ft
Avalanche Details

Observed two older avalanches, one smaller slide at ridgeline below a cornice lookers left from tenderfoot in extreme terrain. Looked to be a shallow wind slab. Also a small slide on a north facing indicator slope a few hundred feet about lake level. Looked to be a soft wind slab with a 2 foot crown, bed surface was november rain crust. Observed tracks into and out of it, probably a ski cut triggered slide.

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

Unfortunately my route took me into micro avalanche terrain, due to the small slope and lack of terrain trap I felt it appropriate to jump around above the most likely trigger point before committing to the slope adjacent to slide mentioned above. Got a super small collapse and a 5 foot crack but no further propagation or movement.

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

15 degrees, no wind, sunshine on the other side of the valley.

Snow surface

Settled powder with between .5 and 3 inches of surface hoar/facets to watch next time it snows, facet depth decreased with elevation. Variable wind blown snow above tree line, looked like prevailing winds were from the north.

Snowpack

November rain crust was ubiquitous, about two feet down.

Photos & Video
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