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Avalanche: Turnagain

Location: Eddies

Date:
Observer:
Route & General Observations

Eddies to 2300′. Checking out wind effect and the MLK Jr facet/buried surface hoar interface with the recent storm snow within the snowpack.

Pluming observed off of Pyramid and Carpathian on the drive to the Pass.

Avalanche Details
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Trigger SkierAvalanche Type Hard Slab
Aspect NorthElevation 2000ft
Slope Angle 38degCrown Depth 24in
Width 20ftVertical Run 50ft
Avalanche Details

We found two skier triggered avalanches as we were skiing down that both looked to have been triggered the day before. One was a small wind slab that was only 4-6" deep. The other was a bit bigger and failed on buried surface hoar 1-2' deep on a steep convexity that was wind loaded.
We don't know if anyone was actually caught or carried.

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

Two skier triggered avalanches
Active wind transport starting around 3:00pm

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

Cloudy skies with light snow starting around noon.
Temperature was 3°F at start of tour and 20° at the end @ 500'. Seattle ridge wx station in the upper single digits during the tour.
Winds picked up around 3 pm and were northeasterly and gusty.

Snow surface

As soon as we popped out of the trees wind effect was noticeable to varying degrees. Generally a 1-6" wind crust, getting more pronounced the higher we went and the more exposed the terrain.

Snowpack

See photos.
The weak snow that formed in the cold clear weather in January got buried by a series of storm with the first one being on MLK Jr day. Since the layer was buried by that storm we are tracking it as the MLK Jr layer. This is now 2-3' deep. We found buried surface hoar at the top of the facets in both of our pit locations and the impromptu crown investigation we did on a recent skier triggered avalanche on at 1900' on N aspect of Eddies.

Photos & Video
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