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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.07.18 Name: Savage Operation: SAC
 Drainage/Route:  Baker Ck mainly (also Brodie, Apollo, Norton Cks) Observed Terrain:  many aspects below 7900', SW-S-SE-E 7900-9300' Zone/Region:  Smoky & Boulder Mountains
WEATHER OBSERVATIONS
 HN24: 0 HST: 0 Sky: BKN Precip: Temps: 30's F
 Ridgeline Wind: Calm and Intermittent from the NW
 Blowing Snow: Prev Snow Available for Transport: None
AVALANCHE OBSERVATIONS
None Reported
SNOWPACK OBSERVATIONS
 HS: ~70-75cm on solars 8000-8400...variable above that on solars due to significant wind exposure 
 Upper Pack: 1-3cm corn below 8700', 15-25cm moist crusts and FC and DF: surface crust >8700', then matrix of mixed forms/crusts/FC: surface crusts (wind+temp+rain+sun) in general below 9000', only dry surface snow observed was on ridge at 9200' 
 Middle Pack: 8400' S: crusts and FC and mixed forms, FC below about 35cm 
 Lower Pack: 12/19 FC, Thanksgiving crust and FC...some of these layers were moist...mud and wet FC/mixed forms at and near the ground 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
20-60cm

Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:

Terrain
  Primary Concern Comments: No obvious signs of instability...but bad structure and unstable ECT result.
STABILITY TESTS
 Stability Test Results: ECTP, 18, mix of BRK and SC (broke all the way across the column with obvious collapse but was irregular/non-planar). Failed in 12/19 and possibly 12/2 layer, following dry portions of the snowpack. The crack did not go through the areas of the snowpack with moist or wet layers.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: MODERATE Trend:
 Comments (aspects and elevations of instability, etc): SW-S-SE aspects
BOTTOM LINE
 Comments: No obvious signs of instability (recent avalanches, cracking, collapsing, etc), but still getting unstable test results complicates the issue. I was traveling solo and continued to avoid all steep, wind-loaded consequential terrain...but it would have been hard to trigger an avalanche in the limited area I traveled.
FILE ATTACHMENTS

180207_BakerCk_8400south.jpg
pit before ECT performed, obvious 12/2 crust in lower pack

180207_BakerCk_ECTP18.jpg
Strange break that followed dry portions of FC layers and went around moist FC crystals...ECTP18, 8400', S.

180207_Baker_slopes to avoid.jpg
Suspect slopes I tried to remotely trigger from the side or from just above...no results.