Sherwins - cornice collapse resulting in wide avalanche running thru trees

AVALANCHE OBSERVATION
Sherwins

Drainage:

Submission Info
josh feinberg
Forecaster
Saturday, March 2, 2019 - 2:00pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Avalanche Type: 
Dry
Slab
Slope: 
40degrees
Trigger type: 
Skier
Crown Height: 
2 ft
Aspect: 
Northeast
Weak Layer: 
Storm Snow
Avalanche Width: 
250ft.
Terrain: 
Near Treeline
Elevation: 
9 900ft.
Bed Surface: 
Storm Snow
Avalanche Length: 
450ft.
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

Carefully stomping on edge of small cornice resulted in larger sympathitic cornice collapse, which triggered a very wide avalanche across the top of the Sherwins just skiers left of the hose (~200-300').  The debris ran atleast 400' down slope in some places, and deposited up 3-4ft deep on the uphill side of some trees.  The cornice collapse/crown face was 4-5' tall in some places.  

Avalanche Photos: 
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Strong
Precipitation: 
Snow
Wind Direction: 
Southwest
Accumulation rate: 
Greater than 1 in. per hour
More detailed information about the weather: 

Snowing and blowing!

Number of People Caught: 
0
37° 36' 31.7412" N, 118° 59' 29.9724" W
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