small slide on angora

Location Name: 
SE chute abover lower angora lake
Region: 
Echo Summit Area
Date and time of avalanche (best estimate if unknown): 
Thu, 02/23/2017 - 13:00
Location Map: 
United States
38° 51' 59.1984" N, 120° 4' 10.7976" W
See map: Google Maps
US


Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
Observation made by: Public
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
40degrees
Trigger type: 
Snowboarder
Crown Height: 
Less than 1 ft
Aspect: 
Southeast
Weak Layer: 
Storm Snow
Avalanche Width: 
75ft.
Terrain: 
Above Treeline
Elevation: 
8 000ft.
Bed Surface: 
Old Snow
Avalanche Length: 
500ft.
Number of similar avalanches: 
2
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

Small wind slab release broke under first rider at steep rollover into chuteabove lower angora lake. Broke under 1st rider below steep rollover into chute and fractured up to 2nd rider 10-20yds behind. Both riders traversed to small ridge above slide path to safety. 1 dog was caught and slid 100-200ft before escaping. 6-10" crown of the newest storm snow which had been mildly sun compacted. At the bottom we observed other tracks that had smaller point releases. No other instabilities noted. Weak point was between old/new snow interface with 6-10" of sun compacted new snow.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
50% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Static
Wind Direction: 
West
Accumulation rate: 
None