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PROFESSIONAL OBSERVATION FORM
 Start Date: 03.26.18 End Date: 03.26.18
 Drainage/Route:   Observed Terrain:  8100-9400 feet, NE through South aspect Zone/Region:  other - Galena Summit Pass
WEATHER OBSERVATIONS
 HN24: 0 HST: 0 Sky: FEW Precip: Temps: -4 to 6 Deg C
 Ridgeline Wind: Light and Intermittent from the NW
 Blowing Snow: None Snow Available for Transport: Small amounts
AVALANCHE OBSERVATIONS
None Reported
SNOWPACK OBSERVATIONS
 HS: 232 cm 
 Upper Pack:  
 Middle Pack:  
 Lower Pack:  
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Storm Slab

Layer/Depth:
15-20 cm

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Specific
Terrain
  Primary Concern Comments: Reactive only to shovel tilt test
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:
30

Likelihood of Triggering
Sensitivity:
Reactive

Spatial Distribution:
Isolated
Terrain
  Problem 2 Comments: shallow and small wind slab - ski cut test SC-C @ 35 Deg Slope
 
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Problem 3 Comments: Persistent weak Layer buried > 1 meter at snowpit site
 Comments: Picture of thin slice showing storm slab: https://photos.app.goo.gl/Ocp1lEHdqhuRGgJd2
Picture of tilt test with storm slab fracture planes: https://photos.app.goo.gl/BmUIeaOuYzC6ut7l1
STABILITY TESTS
 Stability Test Results: See attached snow-pit diagram. Summary: only reactive layers in the top 1 meter are storm slab at 13 & 20 cm depth.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: MODERATE Trend: Improving
 Comments (aspects and elevations of instability, etc): No evidence of instability at Galena Summit. Solar radiation had no impact, Temps remain cold throughout the day. Assessment of snowpack structure suggest top meter at N, NE, E aspect lacks instabilities at areas where the snowpack is uniformly distributed (where snowpack HS ~ 2 meters).
BOTTOM LINE
 Comments: Would like to have more information about avalanche cycle for the releases shown in the pictures included below.
https://photos.app.goo.gl/xQG1cXZYZR2Mqyq33
https://photos.app.goo.gl/gEH7agw4QlPAjhQU2
https://photos.app.goo.gl/sk7Npr1wt6SaK1Rt2

It seems from the snow-pit at Galena pass and the avalanche releases in Alpine terrain (and at treeline) that there is quite a spatially variable snowpack (from low to considerable danger depending of location). Monday was the first time I toured the Galena Summit area during this season, I am left hungry for more information ... in other words ... if I wanted to ski tour alpine terrain, I will be uncomfortable with the level of information I have, and I will have to assume that the persistent slab problem in the alpine terrain presents high risk and limited terrain travel mitigation where it is steep and rocky.
FILE ATTACHMENTS

GalenaPass-26-Mar.png
snowpack hardness profile with test results