Pro Field Report

Basic Information

Observation Details

Observation Date:
January 1, 2021
Submitted:
January 2, 2021
Observer:
SAC - VandenBos (off duty)
Zone or Region:
Galena Summit and Eastern Mtns
Location:
Eagle Creek

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
Widespread
Collapsing? 
Widespread
Stability rating falls apart here. Expected and received unstable test scores. Did not expect natural avalanches. Did anticipate the possibility of triggering large slide, particularly on steeper, wind loaded slope.

Snow Stability

Stability Rating: 
Poor
Confidence in Rating: 
Low
Stability Trend: 
Steady

Bottom Line

This snowpack will not hold up well to additional loading. Continue to be amazed at the ability of very soft slabs to propagate fractures on this weak layer. This is not a good sign.

Advanced Information

Snowpack Observations

Upper snowpack is faceting, particularly below inversion. Fresh crop of widespread SH up to ~8,200'

Below persistent inversion
Above persistent inversion

Avalanche Problems

Problem Location Distribution Sensitivity Size Comments
Persistent Slab
Isolated
Specific
Widespread
Unreactive
Stubborn
Reactive
Touchy
D1
D1.5
D2
D2.5
D3
D3.5
D4
D4.5
D5
 Layer Depth/Date: down 30cm
Weak Layer(s): Dec 11, 2020 (FCsf)