Location: Spencer Bench Cabin

Route & General Observations

Placer overflow parking lot to Squirrel Flats to Spencer Bench Cabin

Avalanche Details
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Trigger NaturalRemote Trigger0
Avalanche Type Soft SlabAspect South
Elevation 2000ftSlope Angleunknown
Crown Depth 12inWidth 80ft
Vertical Run 200ft  
Avalanche Details

Soft slab triggered remotely from the ridge (we think). Appeared to be relegated to the storm snow (~12"). Minimal wind loading on this slope. SS-AM-R1D1-I

Triggered one other very small (~6") slab on a small test slope. Similar elevation/ aspect.

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

Saw a couple of other shallow, fresh wind slabs in very steep, alpine terrain below corniced ridge above Comet Glacier. Significant flagging on ridges from NW winds this morning.

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

~12" new snow above 700'. Sunny and warm. Moderate to strong winds from the NW this morning. Fortunately the wind subsided around 1pm.

Snow surface

~12" new snow on supportable crust above 700' Crust is semi-supportable in Placer Valley, fat bike would be a challenge until we see some cooler temps.


No formal stability tests but did a lot of shoveling at the Spencer Bench Cabin. HS= 175cm at 1900'.

We found the MLK buried surface hoar about 50cm down.

Photos & Video
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