Many sluffs, Intentional Skier triggers in Red Cone Bowl

AVALANCHE OBSERVATION
Mammoth Rock and Mammoth Crest

Drainage:

Submission Info
Forecaster
Saturday, March 25, 2017 - 11:30am
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Avalanche Type: 
Dry
Slab
Slope: 
40degrees
Trigger type: 
Skier
Crown Height: 
1 ft
Aspect: 
North
Weak Layer: 
Old Snow
Avalanche Width: 
40ft.
Terrain: 
Near Treeline
Elevation: 
10 400ft.
Bed Surface: 
Old Snow
Avalanche Length: 
400ft.
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

Skinned up from the end of Old Mammoth Rd to Tamarack ski trails, up Red Cone by standard approach through Crystal Trees, kicked cornices above Red Cone Bowl, skied low angle Crystal Trees down to Horseshoe and back down to car.

Many natural D1 loose dry avalanches under Mammoth Rock at 0830. Slid last night or early this morning. 30-40cm of storm snow. Temperatures already above freezing at 1000 (2.5 C). Sky went from overcast at 0930 to scattered clouds by 1030. Many more recent natural D1 sluffs under the Lake George Cliffs and all along the Mammoth Crest.

Stomped two cornices in Red Cone Bowl. One 1' by 4' section broke off and triggered a D1.5 that slid a few hundred feet into the bowl. Stomped on another section above a steeper slope which triggered a D2 that slid to the bottom of the bowl. (See photos)

Ski testing slopes is an advanced skill that can be dangerous without proper experience. Skier safety is number one when testing slope stability! These results were expected and the tests done very carefully.

 

Avalanche Photos: 
Cloud Cover: 
50% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
Air temperature trend: 
Warming
Wind Direction: 
South
Accumulation rate: 
More detailed information about the weather: 
Number of People Caught: 
0
37° 35' 44.4624" N, 119° 1' 31.0008" W

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