Pro Field Report

Basic Information

Observation Details

Observation Date:
January 16, 2020
Submitted:
January 16, 2020
Observer:
SAC - Davis, VandenBos, Lundy
Zone or Region:
Galena Summit and Eastern Mtns
Location:
Baker Lake Trailhead

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
Isolated
Collapsing? 
Isolated
We experienced two large, deep collapses on weak facets near the ground as we ascended a ridge adjacent to the accident site. At the ridge, we experienced a smaller collapse in recently formed wind slab.

Snow Stability

Stability Rating: 
Fair
Confidence in Rating: 
Moderate
Stability Trend: 
Steady

Bottom Line

The objective of this field day was to gather data at the scene of Wednesday's fatal avalanche. We'll post a preliminary video soon and will also share the full accident report once all the information has been compiled.

Advanced Information

Weather Summary

Cloud Cover:
Overcast
Temperature:
Mild, estimating 15-25 F depending on elevation.
Wind:
Moderate , S

5 cm new snow overnight. Overcast to start and end the day. One brief period of snow with no accumulation. Diffuse sun at midday. Relatively calm at middle and low elevations. Light S wind at 9,300', snow plumes off the higher peaks of the Smoky Crest.

Avalanche Observations

 #  Date Location Size Type Bed Sfc Depth Trigger Comments Photo
3 E. Fork Baker Creek
SE 7,200' 		D1 SS O-Old Snow 1' Small pockets of recent snow (since 1/10) that likely failed on facets near the ground. None

We had a good look into Apollo, Brodie and beyond and did not see much sign of recent avalanches.

Avalanche Problems

Problem Location Distribution Sensitivity Size Comments
Wind Slab
Isolated
Specific
Widespread
D1
D1.5
D2
D2.5
D3
D3.5
D4
D4.5
D5
 Layer Depth/Date: 1-3'
Comments: There were multiple generations of wind slab at middle and upper elevation and recent loading patterns along ridge line showed both strong S and N wind events. Active wind-loading was occurring from the south along the higher peaks.
Persistent Slab
Isolated
Specific
Widespread
D1
D1.5
D2
D2.5
D3
D3.5
D4
D4.5
D5
 Layer Depth/Date: 1-3'
Comments: Generally shallow snowpack with the recent snow (since Jan 10th) making up a substantial percent of the overall depth. Widespread weak layers near the ground.

Terrain Use

We were very cognizant of slope angles and connected slopes. We didn't feel safe approaching the crown due to concerns of remote triggering and hangfire.