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PROFESSIONAL OBSERVATION FORM
 Start Date: 01.20.18 Name: VandenBos Operation: SAC
 Drainage/Route:  Central Sawtooths Observed Terrain:   Zone/Region:  Sawtooth Mountains
WEATHER OBSERVATIONS
 HN24: HST: 20cm Sky: BKN Precip: Temps:
 Ridgeline Wind: Light and Intermittent from the NW
 Blowing Snow: L Snow Available for Transport: Large amounts
 Comments: Plenty of low density snow left for transport.
AVALANCHE OBSERVATIONS
 No. Location Date Size Type Trigger Aspect Elevation Comments
 Many Yesterday Low density new snow had sluffed in many places.
AVALANCHE PROBLEM ASSESSMENT
Avalanche Characteristics
Character/Avalanche Problem:
Persistent Slab

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Not Observed

Spatial Distribution:

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

Layer/Depth:


Likelihood of Triggering
Sensitivity:
Unreactive

Spatial Distribution:

Terrain
  Problem 2 Comments: 
STABILITY TESTS
 Stability Test Results:
OBVIOUS SIGNS OF INSTABILITY
 Marked with checkmark if observed:
 Cracking (widespread)    
 Collapsing (widespread)    
 Comments: Experienced same widespread cracking and collapsing reported by Matt in the ob from yesterday. Restricted to low elevations where rain crust was thick and nearly supportable, up to ~7,300'. Did not experience any cracking or collapsing above this.
SNOW STABILITY
 Snow Stability Rating for your observed area: Confidence: Trend:
 Comments (aspects and elevations of instability, etc): For distribuition and likelihood the day fit pretty well into moderate, but thanks to uncertainty I'm still traveling with a considerable mindset.