Alex Reed / Ethan
Keep me anonymous if published
Location (general area)
Road conditions to area
few clouds (up to 2/8)
Calm (smoke rises vertically)
Wind direction in degrees
Aspect in degrees
approx. 36 degrees, and approx 32 degrees.
Boot/ Ski penetration
Activity, recent avalanches
skier trigger R1-D1 loose avalanche, and natural R1-D2
Whumphing noises, shooting cracks. collapsing
Obvious avalanche path
We observed a skier trigger R1-D1 loose avalanche at about 9500' on N aspect below tree-line, and an older natural R1-D2 avalanche on the N aspect at about 9250'. We were descending from Grinnell Mountain in the San Gorgonio area.
The skier triggered R1-D1 may have been powerful enough to knock skier off their feet, but not big or powerful enough to bury anyone. It was caused when skiing through unconsolidated heavy snow on shaded/colder N aspect on a slope approx. 36 degrees. Loose debris ran for approx. 100 feet before coming to a stop.
Skiers were well out of harms way in a safe zone.
Further down the descent, at approx. 9250' on N aspect we observed a natural avalanche that had occurred a few days prior. We did not see an obvious crown. Perhaps a loose point release stepped down into a crust? The debris visible do seem bonded in small blocks, indicating more structure in the snow than just a loose point release.
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Yes I would like this observation Published