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Avalanche: Sunset Peak

Observer Name
Torrey, Lambrose, Conover, Nassetta, Hadley
Observation Date
Friday, December 6, 2019
Avalanche Date
Friday, December 6, 2019
Region
Salt Lake » Big Cottonwood Canyon » Sunset Peak
Location Name or Route
Sunset Peak
Elevation
10,200'
Aspect
North
Slope Angle
Unknown
Trigger
Unknown
Avalanche Type
Soft Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
Unknown
Comments
Travels today took us from the Brighton Base area, up the Dog Lake ridge, and into Martha Bowl area. Coverage is quite impressive and allows for moving around without much fear of hitting rocks or stumps.
During our ascent, we experienced one localized collapse on an East facing slope at 9500'. We noted widespread Surface Hoar development. Cold in the shade but quite warm in the sun. Calm winds and clear skies. No Smog noted up here.
As we reached the top of our ski run, we noticed what looked to be two fresh avalanches mid-slope on Sunset peak. We did not see any tracks within the immediate vicinity that could have triggered these two slab avalanches. They appeared to have been either remotely triggered from several hundred feet away or occurred naturally.
The few inches of dense creamy snow from yesterday (Dec. 5th) skied very well and fast on lower angle slopes. It was great riding! Creamy, hero snow, a little went a long way.
Comments
More info from UDOT LCC Tim Rogers - Observed two recent full depth slides along the bench below Sunset Peak today about mid-day. After climbing to the top of Rocky Point we observed evidence of recent widespread cracking to ground throughout the slope from Rocky Point towards Sunset Peak and well down the slope as well. Unable to see avalanche activity from this vantage but we decided to retreat to Catherine's Pass and descend towards Brighton. While traversing towards the lake we observed these two slides that appeared to be recent with no evidence of new snow or wind loading on the bed surface or debris. Possible that these pieces released naturally sometime last night or earlier today, also possible that they were triggered remotely by skier traffic along the ridge as there was evidence of several parties having spent some time around Rocky Point but no skier traffic into the area.