Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Enji Cooper
Observation Date:
January 22, 2023
Submitted:
January 23, 2023
Zone or Region:
Olympics
Activity:
XC Skiing/Snowshoeing
Location:
Lightning Peak

Triggered Avalanches

Did you trigger any avalanches? 
Yes
Was it intentional? 
No
Avalanche Type:
Soft Slab
Size:
Size 1: Relatively harmless to people
Elevation:
3.4k'+
Aspect:
N
Comments:
I was triggering a fair bit of weak shallow wind/storm slabs above treeline. The slabs were variable in depth, depending on wind fetch.

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Dry Loose (Sluff)
Size:
Size 2: Could bury, injure, or kill a person
Elevation:
4.1k'+
Aspect:
NE
Comments:
A number of sheer rock faces (50°+) had sluffing below the faces.

Signs of Unstable Snow

None reported

Observations

Yesterday was not a wise day to go snowshoeing.
The snowpack well below treeline and under rainshadows was fairly shallow, due to precipitation input. Out in the open though (even around 2.4k'), the snowpack was considerably deeper, but not deep enough to travel safely between large boulders in fields (found a number of gaps when booting), and it was not consolidated.
Near/above treeline, the snow deepened and trail breaking became extremely tedious (snowshoe penetration was 1'~2') at best, and dangerous, at worst (it was difficult to judge how stable and how deep the snowpack was without extensive probing. I brought my glacier ice axe, but I didn't bring my probe (*sigh*).
I turned around ~800' of the summit once I got a good view of the north gully I would need to climb, saw some recent avalanches in the area, and saw the steepness of the slopes. Yesterday was _not_ the day to push things further.
Downclimbing 25' of a questionably stable snow wall required me to immediately self-arrest after I slipped and fell 5' to avoid crashing into a tree at the base of the wall. I was cursing myself for not bringing rope and a sling for down climbing, technical steel crampons, and ice tools.
Cornices (some failed, some not) were prevalent along the ridge and large (the larger ones had 3'+ deep overhangs). Tree wells were also extremely deep (3'+).

Media

Example tree well around 3.7k'.
Cornices over blown over conifers and boulders. Washington and Ellinor in the background (facing ENE).
Looking back at the sheer rock face to the right of the ascent gully.
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