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Avalanche: Seward, Other Regions

Location: Snug Harbor (near Boulder Creek)

Date:
Observer:
Route & General Observations

Snug Harbor trailhead to site of 2/10 avalanche fatality to Lost Lake weather station and back to Snug Harbor TH.

CNFAIC forecasters traveled to the site of yesterday’s fatal avalanche to gather pertinent snowpack, weather and avalanche information. Preliminary information can be found on the accidents page, under the observations tab. Direct link HERE.

Side trip to Lost Lake weather station for mid-winter maintenance.

Avalanche Details
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Trigger SnowmachinerAvalanche Type Hard Slab
Aspect WestElevation 2600ft
Slope Angle 37degCrown Depth3ft
Width 150ftVertical Run 250ft
Near Miss / Accident Details
Number Caught/Carried? 1Number Partially Buried?0
Number Fully Buried? 1Number Injured?0
Number Fatalities? 1  
Avalanche Details

Snowmachine triggered avalanche on 2/10 resulted in single burial/ fatality.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Observer Comments

Forecasters observed signs of recent avalanches on route in today (2/11).

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

2/11: Partly cloudy, temps in the low teens at 10:30am, warming to low 20's by 5pm. Winds were light, becoming moderate from the north this afternoon. No new precip today.

Snow surface

Wind effected at most elevations. Some soft snow found lower down, in protected areas.

Snowpack

Test pit at 2450' (below avalanche site). West aspect. 17 deg slope. HS: 320cm
CT17,19 and ECTP20, 22. All tests failing at top of January facets 50-70cm down.
50-70cm slab is 1F/ Pencil hard over facets. Bed surface is P/K melt-freeze crust under facets. This is the same failure layer as occurred in the fatal avalanche.

Photos & Video
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