Observation: Turnagain

Location: Sunburst

Route & General Observations

Standard route to 3150′ on ridge. Looking at recent wind effect and reactivity of buried weak layers.

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

One recent looking small wind slab on Seattle Ridge north of the uptrack.
Solar initiated roller balls and small point releases on steep southerly tilted gully features on Seattle Ridge.
Localized cracking on small wind loaded slopes

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

Overcast skies becoming broken and then partly sunny in the late afternoon.
No precip at the Pass
Very light rain coming through the Placer turn around 4:45 pm
A little ridge top wind transport observed around 10 am then calm winds during rest of the tour.
Temperatures in the 20°Fs

Snow surface

1-2" of new snow
Wind skin to wind crust above 2000' in more exposed terrain all the way to our high point.
Some anti-tracks and small sastrugi along the ridge


At 1050' hand pit showed a 4" slab over facets on a melt-freeze crust. Hand pits failed easily.

Pit @ 1550' SW aspect, 36° slope, HS: 310 cm, pit depth 100 cm. Layer of small facets down 20 cm, CT12, CT11, ECTN14. Thin melt-freeze crust down 80 cm with facets below CT20, CT12 ECTX

Pit @ 2300' W aspect, 27° slope, HS: 235 cm, pit depth 100 cm. small facets 35 cm down, CT 20 ECTN21

Pit @ 3200' SW aspect, 26° slope, HS: 300 cm, pit depth 100 cm, small facets 20 cm down CT15, CT14, ECTN17, obvious layer of buried surface hoar down 30 cm no results in stability tests.

Photos & Video
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