Avalanche: Steep Hollow

Observer Name
Weed, McAvoy
Observation Date
Tuesday, December 24, 2013
Avalanche Date
Tuesday, December 24, 2013
Region
Logan » Franklin Basin » Steep Hollow
Location Name or Route
Point of subridge south of Double Top Mt.
Elevation
9,000'
Aspect
North
Slope Angle
Unknown
Trigger
Natural
Avalanche Type
Hard Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
2'
Width
125'
Vertical
250'
Comments

We triggered at least a dozen audible and sometimes visual collapses or woompfs. These were quite large today, collapsing acres at a time reverberating like rolling thunder. At one point the rolling thunder ended in dull booms that sounded like explosives going off in the distance. We also triggered deep shooting cracks and a woompf on a fairly low angled test slope. The 12-23-2013 rime/rain crust was widespread in the Steep Hollow area and increased transmission of our weight due to the crust may have been a factor in the increased size of the collapses we triggered.

The avalanche pictured is the only natural avalanche we saw in the area, which is somewhat surprising. Many slopes probably still sit in a delicate balance, just needing a trigger to make them run....

Comments

We found the trees in Steep Hollow incased in ice on the windward sides and dry on their leeward.

Video
Coordinates