Public Observation
Observation Details
Observation Date:
December 10, 2022Submitted:
December 10, 2022Zone or Region:
Mammoth LakesActivity:
Skiing/SnowboardingLocation:
Horseshoe trees - Deteriorating stability, avalanche activityObservations
We toured up to horseshoe trees and took two laps. On the first up around 11:30 we saw a bit of collapsing but no slides. On the second up an hour later we remotely triggered a small wind slab from about 30-40ft away while walking along an exposed ridge line and remotely triggered a small storm slab from 100 ft away in more sheltered trees. On the second descent down to horseshoe almost every convex roll cracked and slid. At the bottom we remotely triggered a larger storm slab at least 100ft wide at the sunshine wall climbing area. All of the slides appeared to just be the new storm snow
Triggered Avalanches
Did you trigger any avalanches?
YesWas it intentional?
NoAvalanche Type:
Soft SlabSize:
Size 2: Could bury, injure, or kill a personElevation:
9500Aspect:
NEComments:
NE trees dropping to horseshoe. Most were 20-40 ft wide and size D1, one at sunshine wall was 100-200ft wide and size D2 (attached photo, this is not the whole debris field). None ran very far. Typically 6-8inches deep in new snowPhotos:
Observed Avalanches
Did you observe any avalanches?
YesAvalanche Type:
Soft SlabSize:
Size 1: Relatively harmless to peopleElevation:
9700Aspect:
NComments:
I believe we triggered this one remotely from 100ft in sheltered trees. It was small and broke in new snowMedia
