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Observation: Turnagain

Location: Seattle Ridge, Sunnyside

Date:
Observer:
Route & General Observations

10:30 Skin from Tincan Parking Lot to Seattle Ridge DOT Lot
Ascended through Sunnyside Skintrack breaking trail towards Treeline (2,000ft+)
Intentions were to conduct multiple snowpack tests within treeline and assess previous storm snow, current rain line and find SBSH/CBSH layer.
Conducted pits and skied from 2,330ft back to highway.

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)?Yes
Cracking (Shooting cracks)?No
Observer Comments

Multiple Natural Wet, loose releases on E facing uptrack, 1,500 ft on 30° Slope
Skier Triggered Wet, loose slabs that progressed into large, dense roller balls (2,000ft)

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

10:45am RL-RS
Light Wind, Pockets of Blue from North, OVC,
11:30 RS @1,400ft, Calm Wind from N
12:45: 5-15mph.OVC, S-1, Stellar Dendrites @ 2,000ft.
13:00: Consistent 5mph wind from N, OVC, S1

Snow surface

1,000ftP: 30-50cm of cohesive moist-wet layer (recent rain penetration).
1,700ft+: firm, supportable top layer-HS100cm
2,240ft.: Northerly creating wind slabs of up to 100cm within meters of severely wind scoured ridges/convexes.

Snowpack

*See Hardness Profile for Test Pit #1*

Test Pit 1:
Loc: 200 m from Seattle Ridgeline
EL 2,330 ft, S Aspect, 23°, 0°C, OVC/BKN, Calm Northerly Wind, Ski/Boot:35/55cm
STE 40cm down on Rounds/Decomposing
STH 70cm down on LOC MF
CT13 Q2 SP on Stellars/Rounds
CT23 Q3 120cm (full HS) on MF/Base.
ECTN Q2 40cm down on Clus. Rnd Grains

Test Pit 2:
14:42, EL 2,050ft. Southern Aspect, OVC, Calm Wind N, S-1, 37° Incline,
HS 130cm
STE 30cm down
CT9 Q2 SC 20cm down
CT17 Q3 SC 65cm down
CT23 Q3 PC 90cm down

Photos & Video
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