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Observation: Seward

Location: Lost Lake

Date:
Observer:
Route & General Observations

Toured out to pass just South of Lost Lake.

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

I saw recent avalanches on all aspects. I observed a recent R4 avalanche on W aspect of the hill dividing the summer and winter trails. The avalanche was snowmobile triggered and failed on a layer ~45cm deep, and propogated across most of the west aspect of the hill with slope angel > 30deg. I dug a handpit near the crown and found a pencil hard layer that failed on a weak 4F layer at ~45cm. I tracked this same layer of instability around to the N and E aspects at similar elevations where I did a full pit profile.

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

Light Rain, 3C, Light N wind

Snow surface

HS215 at 1850ft. Wet rounds

Snowpack

ECTN20 @ 40cm down, CT21 SC @ 120cm down on wet 2mm clustered rounds

Photos & Video
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