Trimmer Peak snow pit observations

Location Name: 
Trimmer Peak
Region: 
Luther Pass Area (including Job and Freel)
Date and time of observation: 
Sun, 01/24/2016 - 09:00
Location Map: 
United States
38° 53' 23.6292" N, 119° 55' 57.7272" W
US


Red Flags: 
Recent avalanche activity

Observation made by: Public
Snowpit Observations
More detailed information about the snowpack: 

We skiied Trimmer today and dug a couple pits.  We skiied the trees left of the 11s, and saw no visible evidence of instability either on the way up or down.

The lower elvations had firm rain crusts that gave way to increasingly softer surface snow around 7500ft, and became deeper and softer form there up.  

Pit 1 900AM:
North facing, 7755 ft, 30 degrees
looked like a suspect slope and had loads of debris as if a slab had already failed but it was fully buried if true

We saw a number of layers in the new snow, a few of them showing collapse:
30cm-CTE 4 collapse (replicable in a couple columns)
45cm- CTM12 collapse
70cm-CTH 22 collapse.  

We attempted to isolate the suspect 30 cm layer with a PST whcih was 95/100 and arrested upon collapse.
We then did a ECT test on this same 30cm layer, which resulted  ECTP17  

This test was repeated, and was not replicable in fact the second test had non planar break and we were unable to see progation at the fracture.  The first was convincing though.

Pit 2 1030AM:
We wanted to sample the snow in the trees north facing beneath the ridge looking for wind slabs and deep persisten layers

NE aspect, 29 degrees, 9036 ft 

Again, mulitple layers in the new snow, these test gave consistent results in two columns, but all fractures were non planar:
20cm : CTM12 break
40cm: CTM 16 break
55cm: CTM 17 break

ECT and PSTs applied to these layers were non reactive.

PHOTO #1:  Suspect ECTP17 at the 7500ft N facing zone with possible previosu slide

PHOTO #2:  Non reactive PSTs on the suspect rain crusts we encountered

PHOTO # 3:  This is some of the debris in this area, there was much more that this picture dies justice

 

 

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Air temperature: 
Below Freezing
Wind Speed: 
Precipitation: 
Air temperature trend: 
Warming
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: