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PROFESSIONAL OBSERVATION FORM
 Start Date: 12.02.17 Name: VandenBos Operation: SAC
 Drainage/Route:  Big Basin Observed Terrain:  7,000-9,000' Zone/Region:  Wood River Valley
WEATHER OBSERVATIONS
 HN24: HST: Sky: OVC Precip: Temps:
 Ridgeline Wind: Light
 Blowing Snow: Prev Snow Available for Transport: Small amounts
 Comments: Late afternoon wx obs. No snowfall as of 1800.
AVALANCHE OBSERVATIONS
None Reported
SNOWPACK OBSERVATIONS
 HS: 83cm @ 8,850' 
 Upper Pack: ~10cm recent snow sitting on 5cm of Thanksgiving funk, which locally appears to be a crust-facet-crust combo. 1mm near surface facets on top of recent snow.  
 Middle Pack: 40-50cms of stiff, aged snow sitting on a distinct, 1cm thick crust-facet combo. 
 Lower Pack: 25cms of facets with some coarse, dry depth hoar at the ground (3-5mm) 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:
25cm

Likelihood of Triggering
Sensitivity:


Spatial Distribution:

Terrain
  Primary Concern Comments: Likely restricted to middle and upper elevation shady aspects but I didn't spend enough time on solars to confirm this.
STABILITY TESTS
 Stability Test Results: CT22 Q2 and PST 48/100 END on crust-facet combo at 25cm. ECTX.
SNOW STABILITY
 Snow Stability Rating for your observed area: Good Confidence: Trend:
FILE ATTACHMENTS

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