Avalanche: Rolfson

Observer Name
Brett Kobernik
Observation Date
Tuesday, March 6, 2018
Avalanche 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 Weak Layer
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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