| AVALANCHE OBSERVATION Mammoth rock Drainage: |
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| Submission Info Forecaster Wednesday, March 20, 2019 - 9:30am |
Red Flags:
Recent avalanche activity
Recent loading by new snow, wind, or rain
Avalanche Type:
Dry
Slab
Trigger type:
Natural
Crown Height:
1 ft
Aspect:
Northeast
Weak Layer:
Storm Snow
Terrain:
Near Treeline
Elevation:
10 000ft.
Bed Surface:
Old Snow
Number of similar avalanches:
2
Avalanche Photos:
Air temperature:
Precipitation:
Air temperature trend:
Wind Direction:
Accumulation rate:
More detailed information about the weather:
37° 36' 28.7568" N, 118° 59' 27.4056" W
See map: Google Maps
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I observed two natural avalanches on the morning of 3/20. Both were on Sherwin ridge with the crown lines just below cornice features. I suspect both of the avalanches to be wind slabs. One avalanche broke skiers left of the "HOSE" and appeared to be about 80-100' wide and looked have run at least 200' through sparsely spaced trees. The second broke below the cornice skiers right side o main avy path. This avalanche appeared to be much wider and looked to have only run a short distance. Spotted from a distance I would suspect crown depths to be about 12" and destructive size in the D1- D1.5 range.