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Natural wind slab in St. Germaine's Bowl
Location Name:
Spur Ridge of Sargent's into St. Germaine's BowlRegion:
Mt. ShastaDate and time of avalanche (best estimate if unknown):
Sun, 01/28/2018 - 1:00amObservation made by:
ForecasterRed Flags:
Recent avalanche activity
Location Map
96067
Mount Shasta
, CA
United States
41° 22' 34.3092" N, 122° 11' 44.4912" W
See map: Google Maps
California US
Avalanche Observations
Details
Characteristics
Avalanche Type:
DrySlabTrigger type:
NaturalSlope:
35degreesAspect:
EastElevation:
9 400ft.Terrain:
Above TreelineWeak Layer:
Storm SnowBed Surface:
Storm SnowCrown Height:
3 ftAvalanche Width:
200ft.Avalanche Length:
150ft.Number of similar avalanches:
2Number of people caught:
0Number of partial burials:
0Number of full burials:
0Weather Observations
Statistics
SS-N-R2-D1.5-S (soft slab, natural, small relative to path, relatively harmless, bed surface within new snow)
A natural wind slab avalanche occurred late in the afternoon or overnight on Saturday on a spur ridge of Sargent’s Ridge into St. Germaine’s bowl. The avalanche occurred on an east aspect at 9,400 ft. The avalanche broke 1-3 ft deep, 200 ft wide, and ran 150 ft downslope. The avalanche may have been cornice triggered. The avalanche also stepped down to a deeper layer (still within new snow) approximately 20 ft downslope from the crown. This avalanche occurred as a result of the major wind event on Saturday where strong westerly winds blew steadily throughout the day.