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Observation: Turnagain

Location: Seattle Ridge

Date:
Observer:
Route & General Observations

Skinned into the lower meadows of Seattle Ridge on the South end of Turngain Pass to look at a thinner snowpack that received wind loading yesterday. We made it to 2000′ just before the terrain become very steep above. The snow changed in this area from soft sastrugi and wind slabs to scoured and wind stripped above us.

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

None observed.

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

Clear skies
-9F at the car in the shade in the AM.
15F in the sun at the car at 2pm
Winds were calm
No precip

Snow surface

10" of loose snow in the flats near Bertha Cr. and wind textured snow ranging from soft sastrugi with pockets of breakable wind hardened snow

Snowpack

See pit photos below for more info.

Pit at 1450' - SE aspect, HS=70cm to 90cm, Stability tests: CTN, CT17 failed 40cm down on facets, CT18 failed 80cm just above a crust on facets.

Pit at 2000'- SE aspect, HS=110cm, Stability tests: CT18 failed 55cm on facets on upper most crust, CT25 on deteriorating crust above the ground. ECTP2 failed 15cm down on stellars, CTN14 down 30cm on density change.

Photos & Video
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