Loose wet snow activity `below Hole in the wall` cliffs/ slab crowm lines above

AVALANCHE OBSERVATION
Twin Lakes Rd. / Hole in the Wall cliffs

Drainage:

Submission Info
Volunteer Observer
Saturday, March 4, 2017 - 3:00pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Avalanche Type: 
Wet
Loose/Point-Release
Slope: 
35degrees
Trigger type: 
Natural
Crown Height: 
Less than 1 ft
Aspect: 
Northeast
Weak Layer: 
Old Snow
Avalanche Width: 
30ft.
Terrain: 
Below Treeline
Elevation: 
8 900ft.
Bed Surface: 
Unknown
Avalanche Length: 
80ft.
More detailed information about the avalanche: 

Loose wet and rollerball activity below the Hole in the wall cliff.

Also:

Observed crown lines in chutes above cliffs. Looks like they are from small slabs breaking in recent wind slabs.

Snow surface obs: Observed a very wide variety of snow surfaces:

- Windaffected on the NE side of Panorama dome; boot pen 25 cm at 8787 ft.

- MF or sun affected crusts at 8600 ft. in open areas. Boot pen 9 cm at 8600 ft

- dry, loose snow in sheltered areas in the trees Boot pen 15 cm at 8600 ft.

- Sastrugi on windward side of gentle ridge at same elevaton.

 

Blowing Snow: 
Yes
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Moderate
Air temperature trend: 
Cooling
Wind Direction: 
Southwest
More detailed information about the weather: 

Moderate winds with aoccasional higher gusts. Saw steady snow transport, rolling saltation on N side near top of panorama dome.
 

Hole in the Wall cliffs 37° 37' 15.7332" N, 119° 0' 37.5444" W

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