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Observer Name: 
Brett Kobernik
Observation Date: 
Tuesday, March 6, 2018
Occurrence Date: 
Monday, March 5, 2018
Region: 
Rolfson
Location Name or Route: 
Rolfson
Elevation: 
10300
Aspect: 
Northeast
Trigger: 
Snowmobiler
Avalanche Type: 
Soft Slab
Avalanche Problem: 
Persistent Slab
Weak Layer: 
Facets
Depth: 
3.5'
Width: 
300
Vertical: 
400
Comments: 

Trigger is not confirmed but very much appears to be a snowmobile triggered avalanche judging by the tracks.  There is a slight chance that after the riders were on the slope, it released naturally later on with additional wind loading.  However, the tracks and the debris appear to have about the same amount of wind drifted snow on them.  My money is on a sled trigger.

These avalanches are now to the point where they are very dangerous.  We finally have added enough snow to them where they are breaking to the ground.

Coordinates: 
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