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Observation: Turnagain

Location: Seattle Ridge

Date:
Observer:
Route & General Observations

Common up-track to Main Bowl

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

Glide cracks growing - all aspects, all over Turnigain Pass
Two skier triggered wind slabs on Juniors (D1's) likely 1-2 days old
Cornice triggered windslab on West face of Pyramid

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

Partly sunny becoming mostly cloudy in the afternoon
NE winds - 10-15mph
Very short period of flurries - no accumulation
Temps - low 30's in sun, mid 20's in shade

Snow surface

1400 - 2600' -1-15" of low density snow on firm crust, on solar aspects (1-2" sun crust softening in the afternoon)
Surface hoar (2-8mm) on all aspects/elevations, on windward slopes SH was blowing over

Snowpack

Dug a pit at 2600' - West aspect, 27* slope, HS >300cm, see photo diagram - Found intact/partly decomposing stellars 16" (40cm) below surface(4F hard) just below a 1cm rain crust. This density change did not have any propagation in tests. Also found an unreactive layer of buried surface hoar 3.75' (115cm) below surface. Test results: CT16 Q2, ECTN17, ECTN20 (40cm below surface)

Photos & Video
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