Avalanche: Turnagain

Location: Bertha Creek Campground

Route & General Observations

Above the Bertha Creek Campground area (2400′ – 1,200′).
We meadow skipped several laps from 10am – 2pm. The avalanche pictured was not present when we entered the area in the morning, we only saw it after we left in the afternoon. The avalanche is on an aspect turned slightly more towards the sun, which perhaps accounts for the point release(s?) and the propagation of the surface snow. The snow we skied on didn’t even slough.

FORECASTER UPDATE – 8am, Friday February 3rd:
The avalanche mentioned above was reported to have been older by another party. It is possible the slide occurred prior to Thursday, January 2nd.

Avalanche Details
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Trigger NaturalRemote Trigger0
Avalanche Type Dry Loose SnowAspect South Southeast
Elevation 2000ftSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Run 1000ft  
Avalanche Details

One or more point release(s) that entrained a surprising amount of snow into a terrain trap below treeline. Probably only 5-20cm deep. Did not look like it stepped down into the slab, loose surface snow only.

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

Several older avalanches seen across the road on Sunburst/Magnum/Petes. We found almost no signs of instability during our tour, one small collapse when skinning over a particularly thin snowpack over vegetation, otherwise 3-20cm of dry loose snow over a dense slab that ranged from 30cm to "more than ski pole" deep.

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

inversion. 4F at 800' in lot at 9:45am, hi-20's F at 2,000ft at 11am. calm and very bright sunshine

Snow surface

loose, light wind deposited snow over a dense slab.


didn't dig a pit. quick hand pits found a bomber slab over ground level loose facets.

Photos & Video
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