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Observations

Region: Turnagain
Location: Seattle Ridge
Observer:
Date:

Route & General Observations

Common up-track to Main Bowl

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?NoCracking (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

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 Characteristics

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

Photos



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