Avalanche

Alder Ridge

Rob Millspaugh
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Observation photo 1Observation photo 2Observation photo 3Observation photo 4

Quick report

Out to keep progress on this week's freeze-thaw cycle:

  • Found no snow at lower elevations
  • NW slopes at middle elevation were firm and supportable on ascent, ski pen was 6-8inches on descent
  • Dogs started post-holing in isolated pockets above 6000'
  • Above 6500', Northerly slopes still held ~ 1 foot of mostly dry snow above a complex of melt-freeze crusts
  • Found a soft layer of wet rounding facets below the crust, this was unreactive in stability tests
  • Steep and rocky terrain had produced loose dry and loose wet avalanches during the previous two days, but saw no action today.
  • Increasing west winds and cloud cover might have helped quash wet loose
  • Saw the slightest signs of previous wind loading and no blowing snow

We felt comfortable ascending and descending obvious avalanche paths.

 

No obvious signs of instability. Narry a roller ball today.

Weather

Air Temp
Above freezing
Cloud Cover
few
Wind Loading
none
Recent Snowfall
0
Snow Avail For Transport
small smounts

Cloud cover and westerly winds increased in the afternoon.

Snowpack

Pit at 6600' N:  HS = 200 cm, 30 cm slab F-4F on top of firm crust complex.  4F rounding facets (1-2m)  below the crust. ECTX x 2.

Avalanche

Size
D1 R1
Type
L
Count
2
Aspect
W
Trigger
N
Elevation
8000 ft

Recent loose dry and wet loose.