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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.01.19 Name: Lundy Operation: SAC
 Drainage/Route:  Titus Ridge/Timber Bowl Observed Terrain:  8500-9600' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: HST: 30-35cm Sky: SCT Precip: Temps:
 Ridgeline Wind: Light
 Blowing Snow: None Snow Available for Transport: Large amounts
 Comments: Clouds increased through the day and it looked like the mountains were starting to sock in mid afternoon. A bit of S-1 in the late afternoon. Cold temps.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 1 Abes Armchair Within past week 2.5 SS N SE 9500 Persistent slab (see photo)
 ~6 North of McDonald Pk Within past week 1.5 SS N E 9600 Wind/storm slabs (see photo)
 Comments: Glassed most of the Sawtooths and some of the Salmon headwaters. Didn't see any other activity other than what's listed.
SNOWPACK OBSERVATIONS
 HS: 120-140cm in sheltered mid elevations. Obs below from pit at 9200', ENE, 30* 
 Upper Pack: 35cm recent HST on 5-7mm SH (2/2) - I dug a few handpits and didn't find the SH in other locations 
 Middle Pack: 30cm 1F FCxr
30cm 4F FC 2-3mm  
 Lower Pack: 30cm of 4F FC 2-3mm (12/11?)  
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
11/22 & 12/11, 80-100cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: See test results below. Also got a collapse and crack above Timber Bowl
 Comments: No wind slabs observed
STABILITY TESTS
 Stability Test Results: ECTP15 down 35cm on 2/2 SH - not sure this layer is widespread but was very well defined where I dug.
ECTX, PST 45/100end, xslope PST 30/100end downn 85cm on FC (12/11?)
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (isolated) Depth: ~80cm Length: 10m
 Collapsing (isolated) Depth: ~80cm  
 Comments: Stomping in a shallow area atop Timber Bowl, I got a collapse and some cracks that were around 10m in length (see photo). The slope was in the low 30s and did not slide. This was about a hundred yards from the human triggered slide reported on Sunday. I stomped around atop some steeper slopes with no results.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): I feel confident you could trigger a slide if you went looking for it based on what I saw in Timber Bowl.
BOTTOM LINE
 Comments: Was surprised to see the well defined SH layer at the 2/2 interface but suspect it's not that common. The snowpack remains shallow and weak in much of the steep, rocky terrain I observed between the highway and the first bump.
FILE ATTACHMENTS

190208_timber_bowl_cracks.jpg
Cracking in Timber Bowl from stomping in a shallow area.

190208_abes_persistent_slab.jpg
Persistent slab on Abes Chair

190208_mcdonald_avalanches.jpg
Wind/storm slabs north of Mcdonald Peak

190208_titus_SH.jpg
Obvious stripe of SH

190208_titus_SH_xtal.jpg
SH crystals