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PROFESSIONAL OBSERVATION FORM
 Start Date: 02.03.19 Name: VandenBos Operation: SAC
 Drainage/Route:  Eagle-Lake Divide Observed Terrain:  6,300-9,200' Zone/Region:  Wood River Valley
WEATHER OBSERVATIONS
 HN24: HST: 10-20cm Sky: VAR Precip: S-1 Temps:
 Ridgeline Wind: Moderate and Intermittent from the SW
 Blowing Snow: M Snow Available for Transport:
 Comments: Mid-storm rain line ~6,800-7,000' (from early morning 2/3). S-SW aspects took enough sun in the afternoon to form a thin crust
AVALANCHE OBSERVATIONS
None Reported
 Comments: None observed, poor visibility.
SNOWPACK OBSERVATIONS
 HS: Highly variable at low and mid elevations depending on aspect. 85cm @ 7,400' on W aspect. Stats below for same location. 
 Upper Pack: 15cm PP 
 Middle Pack: 60cm DF -> FC, 1-2mm 
 Lower Pack: 20cm DH, 3-5mm 
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:


Spatial Distribution:
Widespread
Terrain
  Primary Concern Comments: 
 
Avalanche Characteristics
Character/Avalanche Problem:
Wind Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Stubborn

Spatial Distribution:
Specific
Terrain
  Problem 2 Comments: 
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Collapsing (isolated)    
 Comments: Isolated, localized collapsing on older wind slabs
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: MODERATE Trend: