Observation: Turnagain

Location: Johnson Pass

Route & General Observations

Field Observations
Predeger/ Davis/ Keeler

February 16, 2013

Johnson Pass

Weather: Calm winds, clear though high clouds moving in by mid-afternoon.
Temperature increasing.

Older shallow storm snow avalanches observed in steep terrain.
No shooting cracks
No collapsing/whoompfing

25-30cm of right side up, low density snow from most recent storm. (Fist hard)

Pit results (Total height of snow = 190cm):
Elevation: 1900′
Aspect: East
Slope Angle: 33 degrees
Test results: ECTP30, PST 40/45 End. 45cm down, 1-2mm facets above upper most
crust that previous ECT failed on. (see video)

Tests do show the potential for a fracture to propagate though it took a
significant amount of weight/ pounding on the block to do so. I suspect that a
cornice/ skier or snowmachiner dropping into a slope could be enough to
influence this layer as this UPPER crust/ facet combo is only half a meter deep
in the Turnagain area.

All in all it was a glorious day to spend in the backcountry. There were a lot
of people out traveling, enjoying a day of sunshine in between storms.

Photos & Video
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